HTMLCSSJAVASCRIPTANGULARINTERVIEW QUESTIONSSQLPYTHONJAVAPHPHOW TOW3.CSSCC++C#BOOTSTRAPREACTMYSQLJQUERYEXCELXMLDJANGONUMPYPANDASNODEJSDSATYPESCRIPTANGULARJSGITPOSTGRESQLMONGODBASPAIRGOKOTLINSWIFTSASSVUEGEN AIAGENTIC AIPROMPT ENGINEERINGDOCKERKUBERNETESSPRINGSPRING BOOTUNIXSCIPYAWSCYBERSECURITYDATA SCIENCEINTRO TO PROGRAMMINGINTRO TO HTML & CSSBASHRUSTTOOLSHTMLCSSJAVASCRIPTANGULARINTERVIEW QUESTIONSSQLPYTHONJAVAPHPHOW TOW3.CSSCC++C#BOOTSTRAPREACTMYSQLJQUERYEXCELXMLDJANGONUMPYPANDASNODEJSDSATYPESCRIPTANGULARJSGITPOSTGRESQLMONGODBASPAIRGOKOTLINSWIFTSASSVUEGEN AIAGENTIC AIPROMPT ENGINEERINGDOCKERKUBERNETESSPRINGSPRING BOOTUNIXSCIPYAWSCYBERSECURITYDATA SCIENCEINTRO TO PROGRAMMINGINTRO TO HTML & CSSBASHRUSTTOOLS

    Site map

    Complete index of 35 courses and 3503+ lessons. XML sitemap for search engines: /sitemap.xml

    Main pages

    HTML(139 lessons)

    1. HTML HOME
    2. HTML Introduction
    3. HTML Editors
    4. HTML Basic
    5. HTML Elements
    6. HTML Attributes
    7. HTML Headings
    8. HTML Paragraphs
    9. HTML Styles
    10. HTML Formatting
    11. HTML Quotations
    12. HTML Comments
    13. HTML Colors
    14. HTML CSS
    15. HTML Links
    16. HTML Images
    17. HTML Favicon
    18. HTML Page Title
    19. HTML Tables
    20. HTML Lists
    21. HTML Block & Inline
    22. HTML Div
    23. HTML Classes
    24. HTML Id
    25. HTML Buttons
    26. HTML Iframes
    27. HTML JavaScript
    28. HTML File Paths
    29. HTML Head
    30. HTML Layout
    31. HTML Responsive
    32. HTML Computercode
    33. HTML Semantics
    34. HTML Style Guide
    35. HTML Entities
    36. HTML Symbols
    37. HTML Emojis
    38. HTML Charsets
    39. HTML URL Encode
    40. HTML vs. XHTML
    41. HTML Forms
    42. HTML Form Attributes
    43. HTML Form Elements
    44. HTML Input Types
    45. HTML Input Attributes
    46. Input Form Attributes
    47. HTML Canvas
    48. HTML SVG
    49. HTML Media
    50. HTML Video
    51. HTML Audio
    52. HTML Plug-ins
    53. HTML YouTube
    54. HTML Web APIs
    55. HTML Geolocation
    56. HTML Drag and Drop
    57. HTML Web Storage
    58. HTML Web Workers
    59. HTML SSE
    60. HTML Certificate
    61. HTML Examples
    62. HTML Editor
    63. HTML Quiz
    64. HTML Exercises
    65. HTML Challenges
    66. HTML Website
    67. HTML Syllabus
    68. HTML Study Plan
    69. HTML Interview Prep
    70. HTML Bootcamp
    71. HTML Summary
    72. HTML Accessibility
    73. HTML Tag List
    74. HTML Attributes (Reference)
    75. HTML Global Attributes
    76. HTML Browser Support
    77. HTML Events
    78. HTML Colors (Reference)
    79. HTML Canvas (Reference)
    80. HTML Audio/Video
    81. HTML Doctypes
    82. HTML Character Sets
    83. HTML URL Encode (Reference)
    84. HTML Lang Codes
    85. HTTP Messages
    86. HTTP Methods
    87. PX to EM Converter
    88. Keyboard Shortcuts
    89. Browser Rendering Engine Overview
    90. HTML Tokenization & Parsing
    91. DOM Construction
    92. CSSOM & Render Tree
    93. Layout, Paint & Composite
    94. Critical Rendering Path
    95. Reflow & Repaint
    96. Compositor Layers & GPU
    97. Core Web Vitals Overview
    98. Largest Contentful Paint (LCP)
    99. Interaction to Next Paint (INP)
    100. Cumulative Layout Shift (CLS)
    101. RUM, CrUX & Field Data
    102. Performance Budgets
    103. Advanced SEO Engineering Overview
    104. Meta, Canonical & Robots
    105. Structured Data & JSON-LD
    106. Hreflang & International SEO
    107. Crawl Budget & Indexation
    108. Open Graph & Social SEO
    109. HTML SEO Audit Checklist
    110. Accessibility Engineering Overview
    111. WCAG Conformance & Testing
    112. Semantic HTML for Accessibility
    113. ARIA Architecture
    114. Keyboard & Focus Management
    115. Screen Reader Testing
    116. Accessible Forms in Production
    117. Frontend Security Overview
    118. XSS & HTML Injection
    119. CSRF & Form Security
    120. Content Security Policy
    121. Iframe Sandbox & Clickjacking
    122. HTML Sanitization
    123. Modern Frontend Architecture
    124. Progressive Enhancement
    125. Islands & Partial Hydration
    126. Micro-Frontends Document Shell
    127. Design Systems & Markup Contracts
    128. SSR & Hydration Markup
    129. Enterprise Frontend Systems
    130. CMS HTML Templates
    131. i18n & RTL Markup
    132. Transactional Email HTML
    133. Print & PDF HTML
    134. Regulated Industries Markup
    135. Case Study: Google Search HTML
    136. Case Study: Shopify Checkout
    137. Case Study: Airbnb SEO Markup
    138. Case Study: Stripe Docs Performance
    139. Case Study: BBC News Accessibility

    CSS(203 lessons)

    1. CSS HOME
    2. CSS Introduction
    3. CSS Syntax
    4. CSS Selectors
    5. CSS How To
    6. CSS Comments
    7. CSS Errors
    8. CSS Colors
    9. CSS Backgrounds
    10. CSS Borders
    11. CSS Margins
    12. CSS Padding
    13. CSS Height / Width
    14. CSS Box Model
    15. CSS Outline
    16. CSS Text
    17. CSS Fonts
    18. CSS Icons
    19. CSS Links
    20. CSS Lists
    21. CSS Tables
    22. CSS Display
    23. CSS Max-width
    24. CSS Position
    25. CSS Position Offsets
    26. CSS Z-index
    27. CSS Overflow
    28. CSS Float
    29. CSS Inline-block
    30. CSS Align
    31. CSS Combinators
    32. CSS Pseudo-classes
    33. CSS Pseudo-elements
    34. CSS Opacity
    35. CSS Navigation Bars
    36. CSS Dropdowns
    37. CSS Image Gallery
    38. CSS Image Sprites
    39. CSS Attribute Selectors
    40. CSS Forms
    41. CSS Counters
    42. CSS Units
    43. CSS Inheritance
    44. CSS Specificity
    45. CSS !important
    46. CSS Math Functions
    47. CSS Optimization
    48. CSS Accessibility
    49. CSS Website Layout
    50. CSS Rounded Corners
    51. CSS Border Images
    52. CSS Gradients
    53. CSS Shadows
    54. CSS Text Effects
    55. CSS Custom Fonts
    56. CSS 2D Transforms
    57. CSS 3D Transforms
    58. CSS Transitions
    59. CSS Animations
    60. CSS Tooltips
    61. CSS Image Styling
    62. CSS Image Modal
    63. CSS Image Centering
    64. CSS Image Filters
    65. CSS Image Shapes
    66. CSS object-fit
    67. CSS object-position
    68. CSS Masking
    69. CSS Buttons
    70. CSS Pagination
    71. CSS Multiple Columns
    72. CSS User Interface
    73. CSS Variables
    74. CSS @property
    75. CSS Box Sizing
    76. CSS Media Queries
    77. Flexbox Intro
    78. Flex Container
    79. Flex Items
    80. Flex Responsive
    81. Grid Intro
    82. Grid Container
    83. Grid Items
    84. Grid 12-column Layout
    85. CSS @supports
    86. RWD Intro
    87. RWD Viewport
    88. RWD Grid View
    89. RWD Media Queries
    90. RWD Images
    91. RWD Videos
    92. RWD Frameworks
    93. RWD Templates
    94. CSS Certificate
    95. SASS Tutorial
    96. How Browsers Parse HTML
    97. CSSOM Construction
    98. DOM vs CSSOM
    99. Render Tree Creation
    100. Layout Engine
    101. Reflow
    102. Repaint
    103. Composite Layers
    104. Critical Rendering Path
    105. Browser Optimization
    106. Core Web Vitals
    107. Largest Contentful Paint
    108. Cumulative Layout Shift
    109. First Input Delay
    110. Layout Thrashing
    111. Paint Optimization
    112. Reflow Optimization
    113. Animation Performance
    114. GPU Acceleration
    115. CSS Performance Profiling
    116. BEM
    117. OOCSS
    118. SMACSS
    119. ITCSS
    120. Atomic CSS
    121. Utility First CSS
    122. CSS Modules
    123. Scoped CSS
    124. CSS in React
    125. CSS in Angular
    126. CSS in Vue
    127. Design Tokens
    128. Theme Architecture
    129. Typography Systems
    130. Color Systems
    131. Component Libraries
    132. Enterprise Design Systems
    133. Multi Brand Design Systems
    134. Dark Mode Architecture
    135. White Label Platforms
    136. Mobile First Design
    137. Fluid Typography
    138. Fluid Layouts
    139. Container Queries
    140. Responsive Images
    141. Responsive Media
    142. Modern Viewport Units
    143. Foldable Device Design
    144. WCAG 2.2
    145. Accessibility Audits
    146. Screen Readers
    147. Keyboard Navigation
    148. Focus Management
    149. Accessible Forms
    150. Color Contrast Systems
    151. Accessibility Testing
    152. XSS Fundamentals
    153. CSS Based Attacks
    154. Content Security Policy
    155. iframe Security
    156. Secure Form Design
    157. Clickjacking Prevention
    158. Design Netflix Homepage
    159. Design Amazon Product Page
    160. Design YouTube Layout
    161. Design SaaS Dashboard
    162. Design Admin Portal
    163. Design Banking Dashboard
    164. Design Analytics Platform
    165. Netflix Frontend Architecture
    166. Amazon UI Architecture
    167. Airbnb Design System
    168. Spotify Web UI
    169. LinkedIn Frontend Platform
    170. Beginner: CSS Fundamentals
    171. Beginner: Box Model
    172. Beginner: Selectors
    173. Beginner: Colors & Typography
    174. Beginner: Layout Basics
    175. Beginner: Flexbox
    176. Beginner: Grid
    177. Beginner: Responsive CSS
    178. Intermediate: Cascade & Specificity
    179. Intermediate: Positioning
    180. Intermediate: Flexbox Patterns
    181. Intermediate: Grid Patterns
    182. Intermediate: Animation
    183. Intermediate: Variables & Theming
    184. Intermediate: CSS Architecture
    185. Intermediate: Performance
    186. Advanced: Rendering Pipeline
    187. Advanced: Containment
    188. Advanced: Container Queries
    189. Advanced: Subgrid
    190. Advanced: CSS Houdini
    191. Advanced: Accessibility
    192. Advanced: Debugging
    193. Advanced: Scale & Migration
    194. Architect: Design Systems
    195. Architect: Multi-Tenant CSS
    196. Architect: Migration Strategy
    197. Architect: Trade-offs
    198. Capstone: Netflix Landing Page
    199. Capstone: Amazon Product Page
    200. Capstone: Enterprise Admin Dashboard
    201. Capstone: Multi Tenant SaaS Platform
    202. Capstone: Design System Library
    203. Capstone: Dark/Light Theme Platform

    JavaScript(230 lessons)

    1. JS Tutorial
    2. JS Introduction
    3. JS Where To
    4. JS Output
    5. JS Syntax
    6. JS Statements
    7. JS Comments
    8. JS Variables
    9. JS Let
    10. JS Const
    11. JS Types
    12. JS Operators
    13. JS If Conditions
    14. JS Loops
    15. JS Strings
    16. JS Numbers
    17. JS Functions
    18. JS Objects
    19. JS Scope
    20. JS Dates
    21. JS Temporal New
    22. JS Arrays
    23. JS Sets
    24. JS Maps
    25. JS Iterations
    26. JS Math
    27. JS RegExp
    28. JS Data Types
    29. JS Errors
    30. JS Debugging
    31. JS Style Guide
    32. JS Reference
    33. JS Projects New
    34. JS 2026
    35. JS HTML DOM
    36. JS Events
    37. JS Functions (Advanced)
    38. JS Objects (Advanced)
    39. JS Classes
    40. JS Asynchronous
    41. JS Modules
    42. JS Meta & Proxy
    43. JS Typed Arrays
    44. JS DOM Navigation
    45. JS Window
    46. JS Web APIs
    47. JS AJAX
    48. JS JSON
    49. JS jQuery
    50. JS Graphics
    51. JS Examples
    52. JS Reference (Advanced)
    53. How JavaScript Engines Work
    54. V8 Architecture
    55. SpiderMonkey Architecture
    56. JavaScript Parsing
    57. AST Generation
    58. Bytecode Generation
    59. JIT Compilation
    60. Hidden Classes
    61. Inline Caching
    62. Deoptimization
    63. Garbage Collection
    64. Memory Heap
    65. Call Stack
    66. Event Loop Architecture
    67. Call Stack
    68. Task Queue
    69. Microtask Queue
    70. Macrotask Queue
    71. Promise Execution
    72. Async Await Internals
    73. Rendering Cycle
    74. requestAnimationFrame
    75. requestIdleCallback
    76. Browser Processes
    77. Renderer Process
    78. DOM Construction
    79. CSSOM Construction
    80. Render Tree
    81. Layout Engine
    82. Reflow
    83. Repaint
    84. Composite Layers
    85. Browser Optimization
    86. Performance Profiling
    87. Lighthouse
    88. Chrome DevTools
    89. Memory Profiling
    90. Heap Snapshots
    91. CPU Profiling
    92. Debounce
    93. Throttle
    94. Virtualization
    95. Lazy Loading
    96. Code Splitting
    97. Tree Shaking
    98. Web Workers
    99. Garbage Collection
    100. Memory Leaks
    101. Detached DOM Nodes
    102. Closure Leaks
    103. Event Listener Leaks
    104. WeakMap
    105. WeakSet
    106. Heap Analysis
    107. XSS
    108. DOM XSS
    109. Reflected XSS
    110. Stored XSS
    111. CSP
    112. CSRF
    113. Secure Cookies
    114. Session Security
    115. Token Storage
    116. JWT Security
    117. Supply Chain Attacks
    118. Module Pattern
    119. Factory Pattern
    120. Singleton Pattern
    121. Observer Pattern
    122. Strategy Pattern
    123. Adapter Pattern
    124. Decorator Pattern
    125. Command Pattern
    126. Proxy Pattern
    127. Pure Functions
    128. Immutability
    129. Composition
    130. Currying
    131. Partial Application
    132. Higher Order Functions
    133. Monads
    134. Functional Design
    135. Reactive Systems
    136. RxJS Fundamentals
    137. Streams
    138. Observables
    139. Subjects
    140. Operators
    141. Error Handling
    142. Backpressure
    143. SPA Architecture
    144. SSR
    145. Hydration
    146. Islands Architecture
    147. Micro Frontends
    148. Module Federation
    149. Monorepos
    150. Nx
    151. Turborepo
    152. Large Scale Frontend Architecture
    153. Folder Structures
    154. Domain Driven Frontends
    155. Feature Based Architecture
    156. Component Architecture
    157. Frontend Governance
    158. Frontend Standards
    159. Unit Testing
    160. Integration Testing
    161. E2E Testing
    162. Jest
    163. Vitest
    164. Playwright
    165. Cypress
    166. Mocking
    167. Test Doubles
    168. Design Netflix Frontend
    169. Design Amazon Product Page
    170. Design Chat Application
    171. Design Real Time Dashboard
    172. Design Trading Platform
    173. Design Collaborative Editor
    174. Netflix Frontend Architecture
    175. Amazon Frontend Architecture
    176. LinkedIn Frontend Platform
    177. Airbnb Frontend Platform
    178. Spotify Web Architecture
    179. Google Docs Architecture
    180. Beginner: Variables and Types
    181. Beginner: Operators
    182. Beginner: Conditionals
    183. Beginner: Loops
    184. Beginner: Functions
    185. Beginner: Strings
    186. Beginner: Arrays
    187. Beginner: Objects
    188. Beginner: Scope Basics
    189. Beginner: Truthy and Falsy
    190. Beginner: DOM Basics
    191. Beginner: JSON Basics
    192. Intermediate: Closures
    193. Intermediate: Prototypes
    194. Intermediate: this Binding
    195. Intermediate: Promises
    196. Intermediate: Async Await
    197. Intermediate: Event Loop Order
    198. Intermediate: Modules ESM
    199. Intermediate: Classes
    200. Intermediate: Destructuring
    201. Intermediate: Map and Set
    202. Intermediate: RegExp
    203. Intermediate: Fetch API
    204. Advanced: V8 Hidden Classes
    205. Advanced: JIT Deoptimization
    206. Advanced: Memory Leaks
    207. Advanced: Microtask Starvation
    208. Advanced: Proxy Reflect
    209. Advanced: Web Workers
    210. Advanced: Performance API
    211. Advanced: Security XSS
    212. Advanced: Design Patterns
    213. Advanced: RxJS Operators
    214. Advanced: SSR Hydration
    215. Advanced: Bundle Optimization
    216. Staff: Frontend Architecture Trade-offs
    217. Staff: Micro Frontend Governance
    218. Staff: INP Optimization Program
    219. Staff: Memory Incident Response
    220. Staff: Security Review Checklist
    221. Staff: Monorepo Scale
    222. Staff: Testing Strategy
    223. Staff: Staff Interview Loops
    224. Capstone: Netflix Clone
    225. Capstone: Amazon Cart System
    226. Capstone: Real Time Chat
    227. Capstone: Kanban Board
    228. Capstone: Collaborative Editor
    229. Capstone: Trading Dashboard
    230. Capstone: Micro Frontend Platform

    Angular(37 lessons)

    1. Angular Home
    2. Angular Intro
    3. Angular Get Started
    4. Angular First App
    5. Angular Templates
    6. Angular Components
    7. Angular Data Binding
    8. Angular Directives
    9. Angular Events
    10. Angular Conditional Rendering
    11. Angular Lists
    12. Angular Forms
    13. Angular Router
    14. Angular Services & DI
    15. Angular HTTP Client
    16. Angular Pipes
    17. Angular Lifecycle Hooks
    18. Angular Styling
    19. Angular App Bootstrap
    20. Angular Control Flow
    21. Angular Signals
    22. Angular Change Detection
    23. Angular Dynamic Components
    24. Angular Advanced DI
    25. Angular Router Advanced
    26. Angular HTTP Interceptors
    27. Angular Forms Advanced
    28. Angular State Management
    29. Angular Animations
    30. Angular Testing
    31. Angular Security
    32. Angular SSR & Hydration
    33. Angular Compiler Basics
    34. Angular Exercises
    35. Angular Interview Questions & Answers
    36. Angular Quiz
    37. Angular Server Integration

    React(120 lessons)

    1. React Home
    2. Introduction to React
    3. What is React?
    4. Why Developers Use React
    5. React vs Traditional JavaScript
    6. Installing React
    7. React Project Setup
    8. Vite Introduction
    9. React Folder Structure
    10. Understanding Single Page Applications
    11. React Developer Tools
    12. JSX Basics
    13. Rendering UI
    14. React Best Practices
    15. React Ecosystem Overview
    16. Introduction to Components
    17. Functional Components
    18. JSX Syntax
    19. Props in React
    20. Component Reusability
    21. Component Composition
    22. Conditional Rendering
    23. Lists & Keys
    24. Event Handling
    25. Forms in React
    26. Controlled Components
    27. Styling Components
    28. CSS Modules
    29. Tailwind CSS Basics
    30. Real UI Components
    31. Introduction to Hooks
    32. useState
    33. useEffect
    34. useRef
    35. useMemo
    36. useCallback
    37. useReducer
    38. Custom Hooks
    39. Hook Rules
    40. Side Effects Management
    41. Performance Optimization
    42. Hook Debugging
    43. Hook Best Practices
    44. Real Hook Examples
    45. Enterprise Hook Patterns
    46. React Router Introduction
    47. BrowserRouter
    48. Routes & Route
    49. Nested Routing
    50. Dynamic Routes
    51. Navigation Components
    52. API Integration Basics
    53. Fetch API
    54. Axios Integration
    55. Loading States
    56. Error Handling
    57. Authentication Flow
    58. Protected Routes
    59. API Optimization
    60. Real SaaS API Workflow
    61. State Management Basics
    62. Local vs Global State
    63. Context API
    64. Context Providers
    65. Redux Introduction
    66. Redux Toolkit
    67. Zustand Basics
    68. Async State Handling
    69. React Query Basics
    70. API Caching
    71. Optimistic UI
    72. State Debugging
    73. Enterprise State Architecture
    74. Performance Optimization
    75. Real Production State Systems
    76. Virtual DOM
    77. React Reconciliation
    78. React Fiber Architecture
    79. Lazy Loading
    80. Code Splitting
    81. Suspense
    82. Error Boundaries
    83. Memoization
    84. Render Optimization
    85. Accessibility (a11y)
    86. Frontend Security
    87. XSS Prevention
    88. React Testing
    89. Component Testing
    90. Enterprise Frontend Patterns
    91. Scalable Folder Structure
    92. Feature-Based Architecture
    93. Design Systems
    94. Component Libraries
    95. Authentication Systems
    96. JWT Frontend Flow
    97. Frontend Logging
    98. Error Monitoring
    99. SEO Optimization
    100. Next.js Basics
    101. SSR vs CSR
    102. Frontend Deployment
    103. CI/CD Frontend Workflow
    104. Production Optimization
    105. Enterprise Frontend Systems
    106. React Exercises
    107. UI Challenges
    108. Hook Challenges
    109. Routing Challenges
    110. State Management Challenges
    111. React Interview Questions
    112. Mock Frontend Interviews
    113. Real Frontend Scenarios
    114. Debugging Challenges
    115. Performance Optimization Tasks
    116. SaaS Dashboard Project
    117. E-Commerce Frontend Project
    118. Portfolio Project
    119. Enterprise Frontend Assessments
    120. Production React Case Studies

    Java(130 lessons)

    1. Java Home
    2. Java Introduction
    3. Java Setup (JDK & IDE)
    4. Java Syntax
    5. Variables & Data Types
    6. Operators
    7. Control Flow
    8. Methods
    9. Arrays & Strings
    10. OOP Concepts
    11. Exception Handling
    12. Collections
    13. File Handling
    14. Multithreading Basics
    15. Enums
    16. Generics
    17. Optional
    18. Date & Time API
    19. Comparator & Comparable
    20. Records
    21. Sealed Classes
    22. Annotations
    23. Reflection
    24. Serialization
    25. Memory Management (Heap, Stack, GC)
    26. Streams API
    27. Functional Programming (Lambdas)
    28. Concurrency & Executors
    29. Design Patterns
    30. Performance Optimization
    31. Logging
    32. Security Basics
    33. Java Memory Model
    34. volatile Keyword
    35. Locks (ReentrantLock)
    36. Atomic Variables
    37. Fork/Join Framework
    38. Structured Concurrency
    39. Spring Boot Basics
    40. REST APIs with Spring
    41. CRUD Application
    42. Microservices Architecture
    43. Database with JPA / Hibernate
    44. Authentication with JWT
    45. Deployment with Docker
    46. Dependency Injection
    47. Spring Bean Lifecycle
    48. Spring Security
    49. Bean Validation
    50. Global Exception Handling
    51. Transactions
    52. Hibernate Internals
    53. Pagination
    54. JPA Specifications
    55. Redis Caching
    56. Kafka
    57. RabbitMQ
    58. OpenTelemetry
    59. Resilience4j
    60. JUnit 5
    61. Mockito
    62. MockMvc
    63. Testcontainers
    64. Integration Testing
    65. Test-Driven Development
    66. Calculator CLI
    67. ATM Simulator
    68. Expense Tracker
    69. Task Manager API
    70. E-Commerce Backend
    71. URL Shortener
    72. Master Q&A Bank — 200+ Questions
    73. Interview Q&A — 4 Years Experience
    74. Interview Q&A — 10 Years Experience
    75. Interview Q&A — 12+ Years Experience
    76. Interview Q&A — 15+ Years Experience
    77. Java Practice Hub: Stream API Coding Questions
    78. Find Even Numbers
    79. Find Odd Numbers
    80. Square Each Number
    81. Remove Duplicates
    82. Count Elements
    83. Find First Element
    84. Find Last Element
    85. Convert To Uppercase
    86. Sort Ascending
    87. Sort Descending
    88. Find Max Salary Employee
    89. Find Min Salary Employee
    90. Group Employees By Department
    91. Count Employees By Department
    92. Find Duplicate Characters
    93. Find Frequency Of Words
    94. Second Highest Number
    95. Second Lowest Number
    96. Merge Two Lists
    97. Partition Even And Odd Numbers
    98. Top 3 Highest Salaries
    99. Most Frequent Element
    100. Longest String
    101. First Non-Repeated Character
    102. First Repeated Character
    103. Flatten Nested Lists
    104. Find Common Elements
    105. Find Missing Numbers
    106. Find Anagram Groups
    107. Remove Null Values
    108. Custom Collectors
    109. Group By Multiple Fields
    110. Nested Grouping
    111. Concurrent Grouping
    112. Window-Like Operations
    113. Stream Performance Optimization
    114. Lazy Evaluation Examples
    115. Parallel Stream Examples
    116. Reduce Examples
    117. Collector Composition
    118. Sales Analytics Dashboard
    119. E-Commerce Order Analysis
    120. Banking Transaction Summaries
    121. Log Processing
    122. Student Result Analytics
    123. Attendance Reporting
    124. Employee Reporting
    125. Product Inventory Reports
    126. Social Media Trend Analysis
    127. Fraud Detection Preprocessing
    128. Java Exercises
    129. Try Yourself Java (Playground)
    130. Java Quiz

    Java Fundamentals(33 lessons)

    1. Java Fundamentals Home
    2. Java Introduction
    3. Java LTS Versions: 8, 11, 17 & 21
    4. JDK vs JRE vs JVM
    5. Java Syntax
    6. Variables and Data Types
    7. Object Oriented Programming
    8. SOLID Principles
    9. Design Patterns
    10. Collections Framework
    11. Generics
    12. Multithreading
    13. Executors Framework
    14. Java Memory Model
    15. Garbage Collection
    16. Java 21 LTS Enhancements
    17. Streams API
    18. Functional Programming
    19. Records & Sealed Classes
    20. Spring Core
    21. Spring Boot
    22. REST APIs
    23. SQL for Java Developers
    24. JPA & Hibernate
    25. Microservices Architecture
    26. Kafka
    27. Redis
    28. Docker
    29. Kubernetes
    30. OpenTelemetry
    31. System Design for Java Engineers
    32. Distributed Systems Patterns
    33. Staff Engineer Mindset

    Spring Framework(14 lessons)

    1. Introduction to Spring Framework
    2. A Short History of Spring
    3. Spring Framework vs Spring Boot
    4. The IoC Container & Beans
    5. Dependency Injection in Practice
    6. Bean Scopes & Lifecycle
    7. Stereotype Annotations
    8. XML vs Java Config vs Annotations
    9. Aspect-Oriented Programming
    10. Transactions with @Transactional
    11. JDBC, JPA & Spring Data
    12. Spring MVC & REST APIs
    13. Spring Security Basics
    14. Testing Spring Applications

    Spring Boot(110 lessons)

    1. Spring Boot Home
    2. Spring Boot Introduction
    3. Spring Boot Architecture
    4. Spring Boot Installation
    5. Spring Initializr
    6. Project Structure
    7. First Application
    8. Dependency Injection
    9. Beans & IoC Container
    10. Configuration
    11. application.properties & YAML
    12. Spring Boot Annotations
    13. Controllers
    14. Request Mapping
    15. Path Variables & Request Params
    16. REST API Basics
    17. CRUD API Development
    18. JSON Handling
    19. ResponseEntity
    20. DTO Design
    21. Exception Handling
    22. Validation
    23. Logging Basics
    24. Introduction to Databases
    25. MySQL Integration
    26. PostgreSQL Integration
    27. Spring Data JPA
    28. Hibernate Basics
    29. Entity Mapping
    30. Entity Relationships
    31. JPQL
    32. Native Queries
    33. Pagination & Sorting
    34. Transactions
    35. Database Optimization
    36. Repository Pattern
    37. Service Layer Architecture
    38. Spring Security Introduction
    39. Authentication
    40. Authorization
    41. JWT Authentication
    42. Refresh Tokens
    43. Role-Based Access Control
    44. Password Encryption
    45. Security Filters
    46. OAuth2 Basics
    47. Secure REST APIs
    48. API Protection Strategies
    49. Session vs Token Auth
    50. Spring Boot Profiles
    51. Environment Configuration
    52. File Upload & Storage
    53. Email Services
    54. Scheduling Tasks
    55. Async Processing
    56. Caching with Redis
    57. WebSockets
    58. Kafka Messaging
    59. Event-Driven Architecture
    60. API Gateway
    61. Rate Limiting
    62. Monitoring & Logging
    63. Performance Optimization
    64. Unit Testing
    65. Integration Testing
    66. Introduction to Microservices
    67. Monolith vs Microservices
    68. Service Discovery / Eureka
    69. API Gateway (Microservices)
    70. Config Server
    71. Circuit Breaker
    72. Distributed Tracing
    73. Inter-Service Communication
    74. Docker for Microservices
    75. Kubernetes Basics
    76. Cloud Deployment
    77. Docker Fundamentals
    78. Dockerizing Spring Boot Apps
    79. CI/CD Pipelines
    80. GitHub Actions
    81. Jenkins Basics
    82. AWS Deployment
    83. Railway / Render Deployment
    84. Production Logging
    85. Monitoring Tools
    86. Scaling Backend Systems
    87. Environment Variables
    88. Production Security
    89. Performance Engineering
    90. Clean Architecture
    91. Layered Architecture
    92. Domain-Driven Design
    93. Backend Design Patterns
    94. Enterprise API Design
    95. Scalable Backend Systems
    96. High Availability
    97. System Design Basics
    98. Optimization Strategies
    99. Enterprise Security Practices
    100. Real Production Folder Structure
    101. Spring Boot Exercises
    102. REST API Challenges
    103. Backend Debugging Tasks
    104. Database Challenges
    105. Authentication Challenges
    106. Architecture Challenges
    107. Spring Boot Quiz
    108. Backend Interview Questions
    109. Mock Backend Projects
    110. Enterprise Case Studies

    Generative AI(80 lessons)

    1. Generative AI Home
    2. Introduction to AI
    3. What is Generative AI?
    4. AI vs ML vs Deep Learning
    5. History of AI
    6. Neural Networks Basics
    7. Introduction to LLMs
    8. Tokens & Embeddings
    9. AI Model Training Basics
    10. Real-World AI Applications
    11. Prompt Engineering Introduction
    12. Prompt Structure
    13. Zero-Shot Prompting
    14. Few-Shot Prompting
    15. Chain of Thought Prompting
    16. System Prompts
    17. AI Persona Prompting
    18. Prompt Optimization
    19. Output Formatting
    20. Prompt Engineering Best Practices
    21. LLM Introduction
    22. Transformer Architecture
    23. Attention Mechanism
    24. Token Prediction
    25. Embeddings
    26. Context Windows
    27. Fine-Tuning Basics
    28. Open Source Models
    29. Model Comparison
    30. LLM Limitations
    31. AI Chatbot Development
    32. OpenAI API
    33. Anthropic API
    34. Hugging Face Models
    35. AI UI Development
    36. AI Workflow Design
    37. AI Automation
    38. AI Content Generation
    39. AI SaaS Applications
    40. AI Coding Assistants
    41. What is RAG?
    42. Embeddings (RAG)
    43. Vector Databases
    44. Semantic Search
    45. Pinecone Basics
    46. ChromaDB Basics
    47. AI Retrieval Systems
    48. Document Chunking
    49. AI Memory Systems
    50. Production RAG Architecture
    51. AI Agents Introduction
    52. Agent Workflows
    53. Tool Calling
    54. Autonomous AI Systems
    55. Multi-Agent Systems
    56. AI Planning Systems
    57. AI Automation Pipelines
    58. AI Research Agents
    59. AI Productivity Systems
    60. Enterprise AI Agents
    61. AI Deployment Basics
    62. AI Hosting Platforms
    63. API Deployment
    64. AI Monitoring
    65. AI Optimization
    66. AI Cost Optimization
    67. AI Security
    68. Scaling AI Systems
    69. Production AI Workflows
    70. Enterprise AI Architecture
    71. AI Exercises
    72. Prompt Engineering Challenges
    73. AI Workflow Challenges
    74. AI Architecture Challenges
    75. AI Debugging Tasks
    76. AI Interview Questions
    77. Mock AI Projects
    78. AI Case Studies
    79. AI Engineering Scenarios
    80. Enterprise AI Problem Solving

    Agentic AI(80 lessons)

    1. Agentic AI Home
    2. Introduction to AI
    3. What is Agentic AI?
    4. AI vs Agentic AI
    5. History of AI Agents
    6. Neural Networks Basics
    7. How LLMs Work
    8. Tokens & Embeddings
    9. AI Reasoning Basics
    10. Real-World AI Applications
    11. Introduction to LLMs
    12. Transformer Architecture
    13. Prompt Engineering Basics
    14. Zero-Shot Prompting
    15. Few-Shot Prompting
    16. Chain of Thought Prompting
    17. System Prompts
    18. Context Management
    19. Prompt Optimization
    20. AI Output Control
    21. What are AI Agents?
    22. Agent Architecture
    23. Planning & Reasoning
    24. Memory Systems
    25. Reflection Loops
    26. Autonomous Agents
    27. Tool Calling Basics
    28. Agent State Management
    29. Agent Communication
    30. Real Agent Workflows
    31. AI Workflow Basics
    32. Task Decomposition
    33. Planning Systems
    34. Sequential Workflows
    35. Parallel Workflows
    36. AI Decision Trees
    37. Workflow Orchestration
    38. Autonomous Execution
    39. Retry Mechanisms
    40. Enterprise Workflow Design
    41. Multi-Agent Introduction
    42. Agent Collaboration
    43. Agent Coordination
    44. AI Communication Protocols
    45. Role-Based Agents
    46. Supervisor Agents
    47. Research Agents
    48. Coding Agents
    49. Multi-Agent Planning
    50. Enterprise Multi-Agent Systems
    51. Introduction to RAG
    52. Embeddings
    53. Vector Databases
    54. Semantic Search
    55. Tool Calling
    56. API Integration
    57. External Knowledge Systems
    58. AI Memory Systems
    59. RAG Optimization
    60. Production AI Retrieval Systems
    61. AI Automation Basics
    62. AI Deployment
    63. AI Monitoring
    64. AI Security
    65. AI Cost Optimization
    66. Scaling AI Systems
    67. Autonomous Automation
    68. AI Workflow Optimization
    69. Enterprise AI Infrastructure
    70. Production Agentic AI Systems
    71. AI Agent Exercises
    72. Prompt Engineering Challenges
    73. Multi-Agent Challenges
    74. AI Workflow Challenges
    75. Tool Calling Challenges
    76. AI Interview Questions
    77. Mock AI Interviews
    78. Enterprise AI Scenarios
    79. AI Debugging Tasks
    80. Production AI Case Studies

    Prompt Engineering(120 lessons)

    1. Prompt Engineering Home
    2. Introduction to Prompt Engineering
    3. What is a Prompt?
    4. Why Prompt Engineering Matters
    5. How LLMs Interpret Prompts
    6. User Prompt vs System Prompt
    7. Prompt Anatomy
    8. Context Windows Explained
    9. Tokens Explained
    10. Prompting Best Practices
    11. Prompting Mistakes Beginners Make
    12. The Future of Prompt Engineering
    13. Prompt Engineering Career Paths
    14. Real-World Use Cases
    15. Phase 1 Key Takeaways
    16. Zero-Shot Prompting
    17. One-Shot Prompting
    18. Few-Shot Prompting
    19. Role Prompting
    20. Persona Prompting
    21. Instruction-Based Prompting
    22. Output Formatting
    23. Structured Prompts
    24. Constraints in Prompts
    25. Delimiter Techniques
    26. XML Prompting
    27. JSON Prompting
    28. Markdown Prompting
    29. Prompt Templates
    30. Prompt Design Patterns
    31. Chain of Thought Prompting
    32. Self-Consistency Prompting
    33. Tree of Thoughts
    34. Step-by-Step Reasoning
    35. Reflection Prompting
    36. Debate Prompting
    37. Socratic Prompting
    38. Multi-Step Workflows
    39. Planning Prompts
    40. Verification Prompts
    41. Critical Thinking Prompts
    42. Agentic Prompting
    43. Tool Calling Concepts
    44. Autonomous Workflows
    45. Advanced Prompt Strategies
    46. Prompt Evaluation
    47. Prompt Iteration
    48. Reducing Hallucinations
    49. Improving Accuracy
    50. Prompt Testing Methods
    51. Prompt Benchmarking
    52. Error Analysis
    53. Prompt Debugging
    54. Token Optimization
    55. Cost Optimization
    56. Latency Optimization
    57. Quality Assurance
    58. Prompt Versioning
    59. Prompt Libraries
    60. Enterprise Prompt Optimization
    61. ChatGPT Prompting
    62. Claude Prompting
    63. Gemini Prompting
    64. DeepSeek Prompting
    65. Open Source LLM Prompting
    66. Copilot Prompting
    67. Coding Prompting
    68. Creative Writing Prompting
    69. Research Prompting
    70. Marketing Prompting
    71. Educational Prompting
    72. Customer Support Prompting
    73. Business Analysis Prompting
    74. Multi-LLM Strategies
    75. Choosing the Right Model
    76. Prompt Workflows
    77. Prompt Security
    78. Prompt Injection Attacks
    79. Jailbreak Prevention
    80. AI Governance
    81. Compliance & Ethics
    82. Enterprise Prompt Libraries
    83. Team Collaboration
    84. Prompt Monitoring
    85. Human-in-the-Loop Systems
    86. AI Safety
    87. Evaluation Frameworks
    88. Prompt Lifecycle Management
    89. Scaling Prompt Systems
    90. Enterprise Case Studies
    91. AI Content Generation
    92. AI Coding Assistants
    93. AI Chatbots
    94. AI Research Assistants
    95. Resume Builders
    96. AI Tutors
    97. Marketing Automation
    98. Customer Support Systems
    99. Legal AI Workflows
    100. Healthcare AI Assistants
    101. Financial AI Systems
    102. AI Agents
    103. AI SaaS Applications
    104. Startup Use Cases
    105. Production Prompt Systems
    106. Prompt Exercises
    107. Beginner Challenges
    108. Prompt Optimization Challenges
    109. Hallucination Reduction Tasks
    110. AI Workflow Challenges
    111. Enterprise Scenarios
    112. Prompt Engineering Interview Questions
    113. Mock Interviews
    114. Real Prompt Reviews
    115. Prompt Audits
    116. Portfolio Projects
    117. Case Studies
    118. Prompt Competitions
    119. Capstone Project
    120. Final Assessment

    MCP (Model Context Protocol)(114 lessons)

    1. MCP Home
    2. What is MCP?
    3. Why MCP Exists
    4. Problems MCP Solves
    5. MCP vs Traditional APIs
    6. MCP Architecture Overview
    7. MCP Terminology
    8. MCP Lifecycle
    9. MCP Ecosystem Overview
    10. Hosts
    11. Clients
    12. Servers
    13. Tools
    14. Resources
    15. Prompts
    16. Context Management
    17. Capabilities
    18. Protocol Handshake
    19. Message Flow
    20. MCP Request Lifecycle
    21. Host ↔ Client ↔ Server Flow
    22. Tool Invocation Flow
    23. Resource Resolution Flow
    24. Prompt Execution Flow
    25. Multi-Server Architecture
    26. Context Synchronization
    27. Error Handling Architecture
    28. MCP Server Introduction
    29. Creating an MCP Server
    30. Defining Tools
    31. Defining Resources
    32. Defining Prompts
    33. Tool Validation
    34. Error Responses
    35. Server Testing
    36. Debugging MCP Servers
    37. MCP Client Introduction
    38. Connecting to Servers
    39. Tool Discovery
    40. Resource Discovery
    41. Prompt Execution
    42. Handling Responses
    43. Retry Strategies
    44. Client Testing
    45. MCP and AI Agents
    46. Agent Tool Use
    47. Agent Memory Integration
    48. Multi-Agent Collaboration
    49. Agent Orchestration
    50. Human-in-the-Loop Agents
    51. Autonomous Agents
    52. Production Agent Architectures
    53. MCP with LangChain
    54. LangGraph Integration
    55. Tool Binding
    56. Context Injection
    57. Agent Workflows
    58. Production Patterns
    59. Authentication
    60. Authorization
    61. Input Validation
    62. Tool Permissions
    63. Resource Isolation
    64. Secrets Management
    65. Secure Context Sharing
    66. Threat Modeling
    67. Logging
    68. Metrics
    69. Tracing
    70. OpenTelemetry Integration
    71. Monitoring Agent Calls
    72. Failure Analysis
    73. Audit Logging
    74. Dynamic Tool Registration
    75. Server Discovery
    76. Multi-Tenant MCP
    77. Distributed MCP
    78. Performance Optimization
    79. Caching Strategies
    80. Scalability Patterns
    81. High Availability
    82. Rate Limiting
    83. Connection Failures
    84. Invalid Tool Definitions
    85. Resource Resolution Failures
    86. Context Drift
    87. Authentication Problems
    88. Timeout Handling
    89. Agent Misbehavior
    90. Debugging Strategies
    91. IDE Assistants
    92. Customer Support Agents
    93. Enterprise Search
    94. Knowledge Assistants
    95. Code Generation Systems
    96. Workflow Automation
    97. Data Analysis Agents
    98. Research Agents
    99. AI Copilots
    100. Build an MCP Calculator Server
    101. Build a File System MCP Server
    102. Build a Database MCP Server
    103. Build an MCP Research Assistant
    104. Build an MCP Code Assistant
    105. Build a Customer Support Agent
    106. Build a Multi-Agent Workflow
    107. Enterprise MCP Platform
    108. MCP Master Interview Bank
    109. MCP Fundamentals Interview
    110. MCP Architecture Interview
    111. MCP Agent Design Interview
    112. MCP Security Interview
    113. MCP System Design Interview
    114. Staff Engineer MCP Interview

    SQL(85 lessons)

    1. SQL Home
    2. Introduction to Databases
    3. What is SQL?
    4. SQL vs NoSQL
    5. Database Management Systems
    6. Installing PostgreSQL / MySQL
    7. Creating Databases
    8. Creating Tables
    9. SQL Data Types
    10. INSERT Queries
    11. SELECT Queries
    12. WHERE Clause
    13. ORDER BY
    14. LIMIT & OFFSET
    15. SQL Aliases
    16. Database Design Basics
    17. Primary Keys
    18. Foreign Keys
    19. Relationships
    20. One-to-One Relationship
    21. One-to-Many Relationship
    22. Many-to-Many Relationship
    23. Normalization
    24. Denormalization
    25. ER Diagrams
    26. Aggregate Functions
    27. GROUP BY
    28. HAVING Clause
    29. Subqueries
    30. Nested Queries
    31. CASE Statements
    32. Window Functions
    33. Common Table Expressions (CTE)
    34. Views
    35. Stored Procedures
    36. INNER JOIN
    37. LEFT JOIN
    38. RIGHT JOIN
    39. FULL OUTER JOIN
    40. SELF JOIN
    41. CROSS JOIN
    42. Multi-Table Queries
    43. Join Optimization
    44. Relationship Queries
    45. Real-World Join Scenarios
    46. Query Optimization
    47. Indexing Basics
    48. Composite Indexes
    49. Execution Plans
    50. Query Performance Analysis
    51. Database Caching
    52. Partitioning
    53. Scaling Databases
    54. SQL Optimization Best Practices
    55. Production Query Tuning
    56. Transactions
    57. ACID Properties
    58. COMMIT & ROLLBACK
    59. Isolation Levels
    60. Locks & Concurrency
    61. SQL Injection
    62. Database Security
    63. User Roles & Permissions
    64. Backup & Recovery
    65. Production Security Practices
    66. E-Commerce Database
    67. Banking Database System
    68. Analytics Dashboard Queries
    69. User Authentication Database
    70. Inventory Management System
    71. SaaS Multi-Tenant Database
    72. Reporting Systems
    73. Data Warehousing Basics
    74. Real Production Database Design
    75. Enterprise SQL Architecture
    76. SQL Exercises
    77. Query Challenges
    78. Database Design Challenges
    79. Query Optimization Tasks
    80. SQL Debugging Exercises
    81. SQL Interview Questions
    82. Mock SQL Projects
    83. Real-World Case Studies
    84. Database Engineering Challenges
    85. Enterprise SQL Scenarios

    PostgreSQL(143 lessons)

    1. PostgreSQL Home
    2. What is PostgreSQL?
    3. PostgreSQL Architecture
    4. Installing PostgreSQL
    5. psql Basics
    6. PostgreSQL Data Types
    7. Creating Databases
    8. Creating Tables
    9. CRUD Operations
    10. Constraints
    11. SELECT Queries
    12. WHERE Clause
    13. ORDER BY
    14. LIMIT & OFFSET
    15. DISTINCT
    16. Aliases
    17. CASE Statements
    18. NULL Handling
    19. Aggregate Functions
    20. GROUP BY
    21. HAVING
    22. INNER JOIN
    23. LEFT JOIN
    24. RIGHT JOIN
    25. FULL OUTER JOIN
    26. SELF JOIN
    27. CROSS JOIN
    28. Join Optimization
    29. Real-World Join Patterns
    30. Subqueries
    31. Common Table Expressions (CTE)
    32. Recursive CTEs
    33. Window Functions
    34. Ranking Functions
    35. LEAD & LAG
    36. Pivot Techniques
    37. Set Operations
    38. Index Fundamentals
    39. B-Tree Indexes
    40. Hash Indexes
    41. GIN Indexes
    42. GiST Indexes
    43. BRIN Indexes
    44. Partial Indexes
    45. Composite Indexes
    46. Covering Indexes
    47. Index Maintenance
    48. EXPLAIN
    49. EXPLAIN ANALYZE
    50. Query Planning
    51. Sequential Scans
    52. Index Scans
    53. Query Optimization
    54. VACUUM
    55. ANALYZE
    56. Performance Monitoring
    57. Connection Pooling
    58. ACID Principles
    59. Transactions
    60. COMMIT
    61. ROLLBACK
    62. SAVEPOINT
    63. Isolation Levels
    64. MVCC
    65. Deadlocks
    66. Locking Strategies
    67. Functions
    68. Stored Procedures
    69. Triggers
    70. Views
    71. Materialized Views
    72. Sequences
    73. Generated Columns
    74. Extensions
    75. JSON
    76. JSONB
    77. JSON Queries
    78. JSON Indexing
    79. Arrays
    80. Composite Types
    81. UUID
    82. Full-Text Search
    83. Authentication
    84. Authorization
    85. Roles
    86. Privileges
    87. Row-Level Security
    88. SSL Connections
    89. Auditing
    90. Security Best Practices
    91. User Management
    92. Backup & Restore
    93. pg_dump
    94. pg_restore
    95. Replication
    96. Streaming Replication
    97. Failover
    98. High Availability
    99. Partitioning
    100. Maintenance Tasks
    101. PostgreSQL on AWS RDS
    102. Azure Database for PostgreSQL
    103. Google Cloud SQL
    104. Managed PostgreSQL
    105. Scaling Strategies
    106. Monitoring Cloud Databases
    107. Logical Replication
    108. Physical Replication
    109. Foreign Data Wrappers
    110. Sharding Concepts
    111. TimescaleDB
    112. PostGIS
    113. pgBouncer
    114. Pgpool-II
    115. Slow Queries
    116. Deadlocks
    117. Connection Problems
    118. Replication Issues
    119. Disk Space Problems
    120. Recovery Strategies
    121. Troubleshooting Checklist
    122. E-Commerce Databases
    123. Banking Systems
    124. Analytics Platforms
    125. SaaS Applications
    126. Multi-Tenant Systems
    127. Event Logging
    128. Inventory Systems
    129. E-Commerce Database
    130. Banking Management System
    131. Blogging Platform
    132. Inventory Management System
    133. Analytics Dashboard Backend
    134. Multi-Tenant SaaS Database
    135. PostgreSQL Monitoring Dashboard
    136. High Availability Setup
    137. PostgreSQL Master Interview Bank
    138. SQL Fundamentals Interview
    139. PostgreSQL Interview (0-2 Years)
    140. PostgreSQL Interview (3-5 Years)
    141. PostgreSQL Performance Interview
    142. PostgreSQL DBA Interview
    143. PostgreSQL Architect Interview

    Arrays & Strings(120 lessons)

    1. Arrays Home
    2. Introduction to Arrays
    3. How Arrays Work
    4. Static vs Dynamic Arrays
    5. Array Memory Representation
    6. Array Traversal
    7. Insertion in Arrays
    8. Deletion in Arrays
    9. Updating Array Elements
    10. Array Time Complexity
    11. Multi-Dimensional Arrays
    12. Common Array Operations
    13. Array Patterns
    14. Prefix Sum Basics
    15. Kadane's Algorithm
    16. Introduction to Strings
    17. String Memory Representation
    18. String Traversal
    19. Character Arrays
    20. Immutable vs Mutable Strings
    21. String Manipulation
    22. String Comparison
    23. String Builder Concepts
    24. Palindrome Problems
    25. Frequency Counting
    26. Anagram Problems
    27. Pattern Matching Basics
    28. ASCII & Unicode
    29. String Complexity Analysis
    30. Real-World String Problems
    31. Linear Search
    32. Binary Search
    33. Bubble Sort
    34. Selection Sort
    35. Insertion Sort
    36. Merge Sort Basics
    37. Quick Sort Basics
    38. Two Sum Problem
    39. Maximum Subarray
    40. Rotate Array
    41. Move Zeroes
    42. Product Array Puzzle
    43. Prefix Sum Problems
    44. Difference Array
    45. Advanced Array Patterns
    46. Reverse String
    47. Reverse Words
    48. Longest Common Prefix
    49. Longest Substring Without Repeating
    50. String Compression
    51. Rabin-Karp Basics
    52. KMP Algorithm Introduction
    53. Z Algorithm Basics
    54. Sliding Window on Strings
    55. String Hashing Basics
    56. Regex Basics
    57. Text Processing Problems
    58. Encoding & Decoding
    59. String Optimization Problems
    60. Advanced String Challenges
    61. Searching Algorithms
    62. Binary Search Patterns
    63. Lower Bound & Upper Bound
    64. Sorting Fundamentals
    65. Stable vs Unstable Sorting
    66. Merge Sort Deep Dive
    67. Quick Sort Deep Dive
    68. Heap Sort Basics
    69. Counting Sort
    70. Bucket Sort
    71. Searching in Rotated Arrays
    72. Peak Element Problems
    73. Search Optimization
    74. Sorting Complexity Analysis
    75. Real Interview Problems
    76. Sliding Window Introduction
    77. Fixed Size Window
    78. Dynamic Window
    79. Two Pointer Basics
    80. Opposite Direction Pointers
    81. Fast & Slow Pointer
    82. Longest Subarray Problems
    83. Minimum Window Problems
    84. Subarray Sum Problems
    85. Duplicate Detection
    86. Partition Problems
    87. Window Optimization
    88. Pattern Recognition
    89. Real Coding Interview Patterns
    90. Advanced Window Challenges
    91. Greedy Array Problems
    92. Matrix Problems
    93. Spiral Traversal
    94. Monotonic Stack Basics
    95. Prefix & Suffix Techniques
    96. HashMap Optimization
    97. Frequency Arrays
    98. Sparse Arrays
    99. Compression Algorithms
    100. Data Stream Problems
    101. Competitive Programming Tricks
    102. Memory Optimization
    103. Time Complexity Optimization
    104. Real Production Algorithm Cases
    105. Enterprise Problem Solving
    106. Arrays Exercises
    107. Strings Exercises
    108. Sorting Challenges
    109. Sliding Window Challenges
    110. Binary Search Challenges
    111. Coding Interview Questions
    112. Mock DSA Interviews
    113. LeetCode Style Problems
    114. Real Interview Scenarios
    115. FAANG Problem Solving
    116. Optimization Challenges
    117. Debugging Tasks
    118. Whiteboard Coding Practice
    119. Pattern Recognition Challenges
    120. Enterprise Coding Assessments

    Trees & Graphs(109 lessons)

    1. Trees & Graphs Home
    2. What are Trees?
    3. Tree Terminology
    4. What are Graphs?
    5. Graph Terminology
    6. Tree vs Graph
    7. Directed vs Undirected Graphs
    8. Weighted vs Unweighted Graphs
    9. Graph Representations
    10. Binary Tree Introduction
    11. Binary Tree Traversals
    12. Preorder Traversal
    13. Inorder Traversal
    14. Postorder Traversal
    15. Level Order Traversal
    16. Recursive Traversal
    17. Iterative Traversal
    18. BST Introduction
    19. Search in BST
    20. Insert in BST
    21. Delete in BST
    22. BST Validation
    23. Lowest Common Ancestor
    24. Kth Smallest Element
    25. BST Applications
    26. AVL Trees
    27. AVL Rotations
    28. Red Black Trees
    29. B Trees
    30. B+ Trees
    31. Segment Trees
    32. Fenwick Trees
    33. Heap Introduction
    34. Min Heap
    35. Max Heap
    36. Heap Operations
    37. Priority Queue
    38. Heapify
    39. Top K Problems
    40. Median from Data Stream
    41. Trie Introduction
    42. Insert in Trie
    43. Search in Trie
    44. Prefix Matching
    45. Auto Complete Systems
    46. Word Dictionary
    47. Bitwise Trie
    48. DFS Introduction
    49. Recursive DFS
    50. Iterative DFS
    51. BFS Introduction
    52. BFS Applications
    53. Multi-source BFS
    54. Dijkstra Algorithm
    55. Bellman Ford
    56. Floyd Warshall
    57. 0-1 BFS
    58. Shortest Path in DAG
    59. A* Algorithm
    60. MST Introduction
    61. Prim's Algorithm
    62. Kruskal's Algorithm
    63. Union Find
    64. Disjoint Set Union
    65. Topological Sorting
    66. Kahn's Algorithm
    67. DFS Topological Sort
    68. Course Schedule Problems
    69. Strongly Connected Components
    70. Kosaraju Algorithm
    71. Tarjan Algorithm
    72. Bridges in Graphs
    73. Articulation Points
    74. Euler Path
    75. Euler Circuit
    76. Hamiltonian Path
    77. Hamiltonian Cycle
    78. Bipartite Graphs
    79. N Queens
    80. Rat in a Maze
    81. Sudoku Solver
    82. Graph Coloring
    83. Word Search
    84. Tree DP Introduction
    85. Diameter of Tree
    86. Maximum Path Sum
    87. DP on Trees
    88. Re-rooting Technique
    89. File Systems
    90. Social Networks
    91. Routing Systems
    92. Recommendation Engines
    93. Dependency Resolution
    94. Search Engines
    95. Auto Complete Engine
    96. URL Router
    97. Social Network Friend Graph
    98. Navigation System
    99. Spell Checker
    100. Dependency Resolver
    101. Recommendation System
    102. Trees & Graphs Interview Bank
    103. Trees Interview (0-2 Years)
    104. Trees Interview (3-5 Years)
    105. Graph Interview (0-2 Years)
    106. Graph Interview (3-5 Years)
    107. FAANG Trees Interview
    108. FAANG Graph Interview
    109. Staff Engineer Interview

    Git(120 lessons)

    1. Git Home
    2. Introduction to Version Control
    3. What is Git?
    4. Why Developers Use Git
    5. Installing Git
    6. Git Configuration
    7. Initializing Repositories
    8. Working Directory Explained
    9. Git Staging Area
    10. Creating Commits
    11. Git Status
    12. Git Log
    13. Undoing Changes
    14. Git Ignore
    15. Git Best Practices
    16. Introduction to Branching
    17. Creating Branches
    18. Switching Branches
    19. Branch Workflow
    20. Feature Branching
    21. Merge Basics
    22. Fast Forward Merge
    23. Merge Conflicts
    24. Conflict Resolution
    25. Git Rebase Basics
    26. Cherry Picking
    27. Stashing Changes
    28. Branch Cleanup
    29. Branch Naming Conventions
    30. Enterprise Branch Strategies
    31. Team Collaboration Basics
    32. Git Pull
    33. Git Push
    34. Git Fetch
    35. Pull Requests
    36. Code Reviews
    37. Forking Repositories
    38. Open Source Workflow
    39. Team Development Workflow
    40. Git Collaboration Strategies
    41. Pair Programming Workflow
    42. Git Permissions
    43. Collaboration Best Practices
    44. Handling Large Teams
    45. Enterprise Git Collaboration
    46. Introduction to GitHub
    47. Creating GitHub Repositories
    48. Connecting Local & Remote Repositories
    49. SSH Keys
    50. HTTPS Authentication
    51. GitHub Issues
    52. GitHub Projects
    53. GitHub Actions Basics
    54. GitHub Discussions
    55. GitHub Releases
    56. Repository Management
    57. Open Source Contributions
    58. GitHub Security
    59. Repository Optimization
    60. Real GitHub Workflows
    61. Git Flow Workflow
    62. Trunk-Based Development
    63. Monorepo Strategies
    64. Semantic Versioning
    65. Release Management
    66. CI/CD Integration
    67. Automated Deployments
    68. Git Hooks
    69. Interactive Rebase
    70. Squashing Commits
    71. Bisect Debugging
    72. Git Submodules
    73. Git Tags
    74. Deployment Workflows
    75. Enterprise Git Architecture
    76. How Git Works Internally
    77. Git Objects
    78. Blobs, Trees & Commits
    79. SHA Hashing
    80. Git Storage Architecture
    81. Pack Files
    82. Performance Optimization
    83. Large Repository Management
    84. Git Garbage Collection
    85. Debugging Git Problems
    86. Recovering Lost Commits
    87. Git Security Practices
    88. Backup Strategies
    89. Repository Scaling
    90. Production Git Systems
    91. Git in Enterprise Teams
    92. SaaS Development Workflow
    93. Frontend Team Collaboration
    94. Backend Team Workflow
    95. Full Stack Development Workflow
    96. Agile Development with Git
    97. DevOps & Git Integration
    98. Release Engineering
    99. Hotfix Workflow
    100. Incident Recovery Workflow
    101. Multi-Team Collaboration
    102. Startup Engineering Workflow
    103. Open Source Engineering
    104. Production Release Pipeline
    105. Enterprise Collaboration Systems
    106. Git Exercises
    107. Branching Challenges
    108. Merge Conflict Challenges
    109. Collaboration Challenges
    110. GitHub Challenges
    111. Git Interview Questions
    112. Mock Git Interviews
    113. Real-World Git Scenarios
    114. Git Workflow Challenges
    115. Debugging Challenges
    116. Open Source Contribution Tasks
    117. Repository Recovery Challenges
    118. CI/CD Git Tasks
    119. Team Collaboration Simulations
    120. Enterprise Git Assessments

    Unix(120 lessons)

    1. Unix Home
    2. Introduction to Unix
    3. History of Unix & Linux
    4. What is a Shell?
    5. Installing Linux/Unix Environment
    6. Understanding the Terminal
    7. Basic Unix Commands
    8. Working with Files & Directories
    9. File Paths Explained
    10. Viewing File Contents
    11. Editing Files
    12. User & Group Basics
    13. Unix Philosophy
    14. Command Line Productivity
    15. Unix Best Practices
    16. Linux File System Structure
    17. Root Directory Explained
    18. File Permissions
    19. chmod Command
    20. chown Command
    21. Symbolic Links
    22. Hard Links
    23. Finding Files
    24. Searching with grep
    25. Working with Archives
    26. Compression Commands
    27. Disk Usage Monitoring
    28. Environment Variables
    29. PATH Variable
    30. File System Security
    31. Introduction to Shell Scripting
    32. Creating Bash Scripts
    33. Variables in Bash
    34. User Input Handling
    35. Conditional Statements
    36. Loops in Shell Scripts
    37. Functions in Bash
    38. Arrays in Bash
    39. Reading Files in Scripts
    40. Command Line Arguments
    41. Exit Codes
    42. Error Handling
    43. Debugging Shell Scripts
    44. Script Optimization
    45. Real Automation Scripts
    46. Introduction to Automation
    47. Cron Jobs
    48. crontab Command
    49. Scheduling Scripts
    50. System Monitoring Scripts
    51. Backup Automation
    52. Log Rotation Basics
    53. File Cleanup Automation
    54. Email Automation Scripts
    55. Automated Deployment Scripts
    56. Monitoring Disk Space
    57. Process Automation
    58. Task Scheduling Best Practices
    59. Automation Security
    60. Production Automation Systems
    61. Advanced Bash Scripting
    62. sed Command
    63. awk Command
    64. Regular Expressions
    65. Process Management
    66. Background Processes
    67. Pipes & Redirection
    68. Linux Signals
    69. Inter-Process Communication
    70. Advanced Text Processing
    71. Parsing Log Files
    72. Shell Performance Optimization
    73. Modular Shell Scripts
    74. Enterprise Shell Workflows
    75. Production Script Engineering
    76. Networking Basics
    77. SSH Fundamentals
    78. SCP & File Transfer
    79. Linux Firewalls
    80. Network Troubleshooting
    81. ping & traceroute
    82. netstat & ss Commands
    83. User Security
    84. Permission Hardening
    85. SSH Key Authentication
    86. Linux Logs
    87. Security Monitoring
    88. Secure Automation
    89. Production Security Practices
    90. Enterprise Unix Security
    91. DevOps Introduction
    92. CI/CD Basics
    93. Deployment Automation
    94. Server Provisioning
    95. Docker Automation Basics
    96. Kubernetes Script Automation
    97. Infrastructure Monitoring
    98. Log Management Systems
    99. Cloud Automation Scripts
    100. Production Incident Automation
    101. SaaS Deployment Workflows
    102. Enterprise Monitoring Systems
    103. Startup DevOps Workflow
    104. Real Production Pipelines
    105. Enterprise Automation Architecture
    106. Unix Exercises
    107. Shell Scripting Challenges
    108. Automation Challenges
    109. Linux Administration Tasks
    110. Debugging Challenges
    111. Unix Interview Questions
    112. Mock DevOps Interviews
    113. Real Production Scenarios
    114. Security Challenges
    115. Performance Optimization Tasks
    116. Infrastructure Challenges
    117. Shell Scripting Assessments
    118. CI/CD Workflow Tasks
    119. Enterprise Unix Scenarios
    120. Production Automation Challenges

    PowerShell(133 lessons)

    1. PowerShell Home
    2. What is PowerShell?
    3. Windows PowerShell vs PowerShell 7
    4. Installing PowerShell
    5. Understanding the Pipeline
    6. PowerShell Syntax
    7. Variables
    8. Data Types
    9. Comments
    10. Help System
    11. Cmdlets Introduction
    12. Discovering Cmdlets
    13. Get-Command
    14. Get-Help
    15. Get-Member
    16. Pipeline Fundamentals
    17. Objects vs Text
    18. Filtering Objects
    19. Selecting Properties
    20. Sorting Results
    21. Understanding Objects
    22. Object Properties
    23. Object Methods
    24. PSCustomObject
    25. Object Formatting
    26. Exporting Objects
    27. Importing Objects
    28. Script Files
    29. Execution Policies
    30. Parameters
    31. Input Validation
    32. Functions
    33. Advanced Functions
    34. Error Handling
    35. Try/Catch/Finally
    36. Logging
    37. If Statements
    38. Switch Statements
    39. Loops
    40. ForEach
    41. While Loops
    42. Break and Continue
    43. Return Values
    44. File Operations
    45. Working with CSV
    46. Working with JSON
    47. XML Processing
    48. ZIP Automation
    49. Scheduled Tasks
    50. Email Automation
    51. Report Generation
    52. Process Management
    53. Service Management
    54. Event Logs
    55. Registry Operations
    56. Windows Management
    57. User Management
    58. Group Management
    59. Disk Management
    60. Network Configuration
    61. PowerShell Remoting
    62. WinRM
    63. PSSessions
    64. Invoke-Command
    65. Remote Script Execution
    66. Secure Remoting
    67. Troubleshooting Remoting
    68. Active Directory Basics
    69. Managing Users
    70. Managing Groups
    71. Password Operations
    72. OU Management
    73. AD Reporting
    74. Bulk Operations
    75. Azure PowerShell
    76. AWS PowerShell Tools
    77. Microsoft 365 Automation
    78. Exchange Online
    79. SharePoint Automation
    80. CI/CD Scripting
    81. Git Integration
    82. Infrastructure Automation
    83. Secure Credentials
    84. Credential Vaults
    85. Secret Management
    86. Code Signing
    87. Script Security
    88. Auditing
    89. Security Best Practices
    90. Pester Introduction
    91. Writing Unit Tests
    92. Mocking
    93. Assertions
    94. Test Coverage
    95. CI Testing
    96. Classes
    97. Modules
    98. Creating Modules
    99. Publishing Modules
    100. DSC Introduction
    101. Desired State Configuration
    102. Reflection
    103. Performance Optimization
    104. Parallel Execution
    105. Debugging Scripts
    106. Verbose Logging
    107. Tracing
    108. Common Errors
    109. Performance Bottlenecks
    110. Troubleshooting Checklist
    111. User Provisioning Automation
    112. AD Cleanup Automation
    113. Patch Reporting
    114. Compliance Reporting
    115. Inventory Collection
    116. Backup Automation
    117. Certificate Monitoring
    118. Health Checks
    119. User Onboarding Automation
    120. Automated Reporting System
    121. Server Health Dashboard
    122. AD Management Toolkit
    123. Backup Verification Tool
    124. Compliance Scanner
    125. Azure Resource Automation
    126. Enterprise Automation Suite
    127. PowerShell Master Interview Bank
    128. PowerShell Fundamentals Interview
    129. Scripting Interview
    130. Active Directory Interview
    131. Automation Interview
    132. DevOps Interview
    133. Senior Engineer Interview

    Selenium(160 lessons)

    1. Selenium Home
    2. What is Selenium?
    3. Why Automation Testing Matters
    4. Selenium Ecosystem
    5. Selenium 4 Overview
    6. Selenium Architecture
    7. Selenium Grid Architecture
    8. WebDriver Internals
    9. Browser Drivers
    10. Installing Selenium
    11. IDE Setup
    12. First Automation Script
    13. Java Refresher
    14. OOP Concepts for Testers
    15. Collections for Automation
    16. Exception Handling
    17. Streams in Selenium
    18. Maven Basics
    19. Gradle Basics
    20. WebDriver
    21. Browser Launching
    22. Navigation Commands
    23. Browser Commands
    24. WebElement
    25. Locators Introduction
    26. ID Locator
    27. Name Locator
    28. XPath
    29. CSS Selectors
    30. Relative Locators
    31. Locator Strategies
    32. Buttons
    33. Input Fields
    34. Checkboxes
    35. Radio Buttons
    36. Dropdowns
    37. Multi-Select
    38. Alerts
    39. Frames
    40. Windows
    41. Tabs
    42. Tables
    43. Calendar Controls
    44. File Upload
    45. File Download
    46. Synchronization Problems
    47. Implicit Wait
    48. Explicit Wait
    49. Fluent Wait
    50. Expected Conditions
    51. Advanced Wait Strategies
    52. JavaScript Executor
    53. Actions Class
    54. Robot Class
    55. Shadow DOM
    56. SVG Handling
    57. Captchas
    58. Dynamic Elements
    59. Hidden Elements
    60. Infinite Scroll
    61. Browser Logs
    62. TestNG
    63. JUnit 5
    64. Assertions
    65. Data Providers
    66. Parameterization
    67. Listeners
    68. Retry Mechanisms
    69. Reporting
    70. Page Object Model
    71. Page Factory
    72. Fluent POM
    73. Builder Pattern
    74. Singleton Driver
    75. Factory Pattern
    76. Strategy Pattern
    77. Screenplay Pattern
    78. Maven Deep Dive
    79. Surefire Plugin
    80. Failsafe Plugin
    81. Dependency Management
    82. Multi-Module Projects
    83. Extent Reports
    84. Allure Reports
    85. Custom Reports
    86. Screenshot Utilities
    87. Failure Analysis
    88. Cucumber Introduction
    89. Feature Files
    90. Step Definitions
    91. Hooks
    92. Tags
    93. Scenario Outlines
    94. Data Tables
    95. BDD Framework Design
    96. REST Assured Basics
    97. GET Requests
    98. POST Requests
    99. Authentication
    100. JSON Validation
    101. API + UI Integration
    102. JDBC Basics
    103. SQL Validation
    104. Data Verification
    105. End-to-End Validation
    106. Grid Setup
    107. Local Grid
    108. Distributed Grid
    109. Docker Grid
    110. Grid on Cloud
    111. Parallel Execution
    112. BrowserStack
    113. Sauce Labs
    114. LambdaTest
    115. Cross Browser Testing
    116. Mobile Browser Testing
    117. Jenkins
    118. GitHub Actions
    119. Azure DevOps
    120. GitLab CI
    121. Test Automation Pipelines
    122. Flaky Tests
    123. Stability Strategies
    124. Test Optimization
    125. Parallel Testing
    126. Resource Management
    127. Execution Strategies
    128. Common Selenium Failures
    129. StaleElementException
    130. NoSuchElementException
    131. TimeoutException
    132. ElementClickInterceptedException
    133. Root Cause Analysis
    134. Debugging Frameworks
    135. AI for Test Generation
    136. Self-Healing Locators
    137. Visual Testing
    138. Generative AI for QA
    139. Future of Testing
    140. E-Commerce Automation Framework
    141. Banking Automation Suite
    142. Healthcare Portal Automation
    143. Travel Booking Automation
    144. HRMS Automation
    145. Insurance Platform Testing
    146. Retail Automation Framework
    147. Enterprise Hybrid Framework
    148. Selenium Interview Bank
    149. Selenium Interview (0-2 Years)
    150. Selenium Interview (3-5 Years)
    151. Selenium Interview (6-9 Years)
    152. SDET Interview
    153. Automation Architect Interview
    154. FAANG QA Interview
    155. QA Engineer Roadmap
    156. SDET Roadmap
    157. Automation Architect Roadmap
    158. Freelancing in Test Automation
    159. Building a Portfolio
    160. Open Source Contributions

    Playwright(154 lessons)

    1. Playwright Home
    2. Why Playwright?
    3. Evolution of Browser Automation
    4. Selenium vs Playwright
    5. Cypress vs Playwright
    6. Playwright Architecture
    7. Browser Engine Support
    8. Installing Playwright
    9. VS Code Setup
    10. Playwright Test Runner
    11. First Playwright Test
    12. JavaScript Essentials
    13. TypeScript Essentials
    14. Async/Await
    15. Promises
    16. ES Modules
    17. Arrays and Objects
    18. Error Handling
    19. Classes and Interfaces
    20. Type Safety in Tests
    21. Browser
    22. BrowserContext
    23. Page
    24. Locators
    25. Built-in Assertions
    26. Auto Waiting
    27. Navigation
    28. User Interactions
    29. Test Structure
    30. getByRole
    31. getByText
    32. getByLabel
    33. getByPlaceholder
    34. getByTestId
    35. CSS Locators
    36. XPath
    37. Chaining Locators
    38. Filtering Locators
    39. Locator Best Practices
    40. Click Actions
    41. Keyboard Input
    42. Mouse Actions
    43. Drag and Drop
    44. Dropdowns
    45. Checkboxes
    46. Radio Buttons
    47. File Upload
    48. File Download
    49. Dialog Handling
    50. Frames
    51. Multiple Tabs
    52. Auto Assertions
    53. Locator Assertions
    54. Page Assertions
    55. Soft Assertions
    56. Retry Assertions
    57. Custom Assertions
    58. Test Hooks
    59. Fixtures
    60. Parallel Execution
    61. Projects
    62. Test Configuration
    63. Tags
    64. Retries
    65. Timeouts
    66. Annotations
    67. Browser Context Isolation
    68. Session Management
    69. Authentication Strategies
    70. Storage State
    71. Network Interception
    72. API Mocking
    73. Route Mocking
    74. HAR Replay
    75. Request Modification
    76. Response Validation
    77. APIRequestContext
    78. GET Requests
    79. POST Requests
    80. Authentication
    81. Contract Validation
    82. Chained Testing
    83. UI + API Integration
    84. Screenshot Testing
    85. Snapshot Testing
    86. Baseline Management
    87. Handling Flaky Visual Tests
    88. Cross-Browser Visual Validation
    89. Trace Viewer
    90. Debug Mode
    91. Inspector
    92. Slow Motion
    93. Performance Analysis
    94. Test Stability
    95. Failure Analysis
    96. Root Cause Investigation
    97. Page Object Model
    98. Component Object Model
    99. Screenplay Pattern
    100. Fixture-Driven Architecture
    101. Builder Pattern
    102. Factory Pattern
    103. Test Data Builders
    104. GitHub Actions
    105. Jenkins
    106. Azure DevOps
    107. GitLab CI
    108. Dockerized Execution
    109. Pipeline Strategies
    110. Parallel Pipelines
    111. BrowserStack
    112. LambdaTest
    113. Sauce Labs
    114. Cross Browser Testing
    115. Cross Platform Testing
    116. Authentication Flows
    117. Authorization Checks
    118. Token Handling
    119. Security Headers Validation
    120. OWASP Automation Ideas
    121. Flaky Tests
    122. Timeout Failures
    123. Selector Problems
    124. Intermittent Bugs
    125. Network Failures
    126. CI/CD Failures
    127. Troubleshooting Checklist
    128. AI Generated Tests
    129. Self-Healing Tests
    130. Playwright MCP Integration
    131. AI-assisted Debugging
    132. Future of QA
    133. E-Commerce Automation Framework
    134. Banking Platform Automation
    135. Travel Booking Automation
    136. Healthcare Portal Automation
    137. HRMS Automation
    138. SaaS Dashboard Automation
    139. Multi-Tenant Platform Testing
    140. Enterprise Playwright Framework
    141. Playwright Interview Bank
    142. Playwright Interview (0-2 Years)
    143. Playwright Interview (3-5 Years)
    144. Playwright Interview (6-9 Years)
    145. SDET Interview
    146. Staff Engineer Interview
    147. Automation Architect Interview
    148. FAANG QA Interview
    149. QA Engineer Roadmap
    150. SDET Roadmap
    151. Automation Architect Roadmap
    152. Freelancing Opportunities
    153. Building a Portfolio
    154. Open Source Contributions

    CI/CD Automation(46 lessons)

    1. CI/CD Automation Home
    2. What Is CI/CD?
    3. CI vs CD vs Continuous Deployment
    4. Pipeline Anatomy
    5. Why Automate Delivery
    6. CI/CD Toolchain Overview
    7. CI/CD Myths & Anti-Patterns
    8. Git Workflows for CI
    9. Branching Strategies
    10. Build Artifacts
    11. Semantic Versioning in CI
    12. Monorepo CI Patterns
    13. Build Caching
    14. Build Failure Triage
    15. GitHub Actions Introduction
    16. GitHub Actions Workflows
    17. GitLab CI Pipelines
    18. Jenkins Basics
    19. Azure DevOps Pipelines
    20. Self-Hosted Runners
    21. Pipeline as Code
    22. Secrets in CI
    23. Continuous Deployment
    24. Deployment Strategies Overview
    25. Blue-Green Deployment
    26. Canary Releases
    27. Rolling Deployments
    28. Environment Promotion
    29. Rollback Strategies
    30. GitOps Basics
    31. Testing in the Pipeline
    32. Linting & Formatting in CI
    33. SAST Security Scanning
    34. Dependency Scanning
    35. Container Image Scanning
    36. Quality Gates
    37. Test Parallelization
    38. DevSecOps in CI
    39. Multi-Stage Pipelines
    40. Matrix Builds
    41. Reusable Workflows
    42. Capstone: Full Pipeline
    43. CI/CD Interview Framework
    44. Mock: Pipeline Design
    45. Mock: Pipeline Incident
    46. CI/CD Cheat Sheet

    XML(120 lessons)

    1. XML Home
    2. Introduction to XML
    3. What is XML?
    4. Why XML Was Created
    5. XML vs HTML
    6. XML Use Cases
    7. XML Syntax Rules
    8. XML Document Structure
    9. XML Declaration
    10. XML Elements
    11. XML Tags
    12. XML Nesting
    13. XML Comments
    14. XML Best Practices
    15. XML Naming Rules
    16. XML Tree Structure
    17. Parent & Child Elements
    18. XML Hierarchy
    19. XML Formatting
    20. XML Special Characters
    21. CDATA Sections
    22. XML Entities
    23. Namespaces
    24. XML Encoding
    25. Unicode in XML
    26. XML Data Representation
    27. Structuring Large XML Files
    28. XML Readability
    29. XML Syntax Validation
    30. Real XML Documents
    31. XML Attributes
    32. Elements vs Attributes
    33. Nested Data Structures
    34. XML Lists
    35. Repeating Elements
    36. Metadata Representation
    37. Attribute Best Practices
    38. Data Modeling in XML
    39. Real Product XML Example
    40. User Profile XML Structure
    41. XML Configuration Files
    42. XML Data Organization
    43. XML Formatting Standards
    44. XML Optimization
    45. Enterprise XML Structures
    46. XML Validation Basics
    47. What is DTD?
    48. Internal DTD
    49. External DTD
    50. XML Schema (XSD)
    51. Defining XML Rules
    52. Required Elements
    53. Data Types in XSD
    54. XML Validation Process
    55. XML Validation Errors
    56. Schema Design Best Practices
    57. Enterprise Validation Systems
    58. XML Security Validation
    59. Production XML Validation
    60. Real-World XML Schemas
    61. Introduction to XML Parsing
    62. DOM Parser
    63. SAX Parser
    64. StAX Parser
    65. Parsing XML with Java
    66. Parsing XML with JavaScript
    67. XML Processing Workflow
    68. Reading XML Files
    69. Updating XML Data
    70. XML Transformation Basics
    71. XPath Introduction
    72. XSLT Basics
    73. XML Data Manipulation
    74. Parsing Performance Optimization
    75. Enterprise XML Processing
    76. XML in APIs
    77. SOAP Web Services
    78. XML Request & Response
    79. XML API Architecture
    80. XML Data Exchange
    81. XML in Banking Systems
    82. XML in Healthcare Systems
    83. XML Configuration APIs
    84. XML Security
    85. XML Encryption Basics
    86. Enterprise Integration
    87. Legacy XML Systems
    88. XML Migration Strategies
    89. Real Production XML APIs
    90. Enterprise XML Workflows
    91. XML in Enterprise Applications
    92. XML Configuration Systems
    93. Android XML Layouts
    94. Maven pom.xml
    95. Spring XML Configuration
    96. SOAP Enterprise Systems
    97. XML Data Feeds
    98. RSS XML Feeds
    99. XML Database Systems
    100. Cloud XML Integration
    101. Financial XML Standards
    102. Government XML Systems
    103. Real XML Architecture
    104. Enterprise XML Pipelines
    105. Production XML Systems
    106. XML Exercises
    107. XML Structure Challenges
    108. XML Validation Challenges
    109. XML Parsing Tasks
    110. XPath Challenges
    111. XML Interview Questions
    112. Mock XML Interviews
    113. Real XML Scenarios
    114. XML API Challenges
    115. XML Debugging Tasks
    116. XML Optimization Tasks
    117. Enterprise XML Assessments
    118. SOAP API Challenges
    119. XML Transformation Tasks
    120. Production XML Case Studies

    MongoDB(120 lessons)

    1. MongoDB Home
    2. Introduction to MongoDB
    3. What is NoSQL?
    4. MongoDB vs SQL Databases
    5. Installing MongoDB
    6. MongoDB Compass
    7. MongoDB Atlas
    8. Understanding Documents
    9. Understanding Collections
    10. BSON Explained
    11. MongoDB Architecture
    12. Database Creation
    13. Collection Creation
    14. MongoDB Best Practices
    15. MongoDB Ecosystem Overview
    16. Document Structure
    17. JSON vs BSON
    18. Nested Documents
    19. Arrays in MongoDB
    20. Embedded Documents
    21. References vs Embedding
    22. Schema Design Basics
    23. Data Modeling
    24. One-to-One Relationships
    25. One-to-Many Relationships
    26. Many-to-Many Relationships
    27. Schema Validation
    28. Real-World Data Models
    29. MongoDB Design Patterns
    30. Enterprise Data Structures
    31. Insert Documents
    32. Find Documents
    33. Query Operators
    34. Update Documents
    35. Delete Documents
    36. Bulk Operations
    37. Projection
    38. Sorting Results
    39. Pagination
    40. Filtering Data
    41. MongoDB Shell Basics
    42. CRUD Best Practices
    43. Error Handling
    44. Query Optimization
    45. Real CRUD Applications
    46. Aggregation Framework
    47. Aggregation Pipeline
    48. Match Stage
    49. Group Stage
    50. Project Stage
    51. Sort Stage
    52. Lookup Stage
    53. Unwind Stage
    54. Facet Stage
    55. Advanced Aggregation Patterns
    56. Text Search
    57. Geospatial Queries
    58. MongoDB Analytics
    59. Performance Optimization
    60. Enterprise Aggregation Workflows
    61. Introduction to Indexes
    62. Single Field Indexes
    63. Compound Indexes
    64. Multikey Indexes
    65. Text Indexes
    66. Geospatial Indexes
    67. Query Planner
    68. Explain Plans
    69. Index Optimization
    70. Performance Monitoring
    71. Slow Query Analysis
    72. Memory Optimization
    73. Caching Strategies
    74. Database Tuning
    75. Production Optimization
    76. MongoDB Security Basics
    77. Authentication
    78. Authorization
    79. User Roles
    80. Encryption
    81. Secure Connections
    82. Replica Sets
    83. Replication Workflow
    84. Failover Handling
    85. Backup Strategies
    86. Recovery Techniques
    87. Sharding Introduction
    88. Distributed Databases
    89. Enterprise Security
    90. Production Reliability
    91. MongoDB in E-Commerce
    92. MongoDB in SaaS Platforms
    93. User Authentication Systems
    94. Content Management Systems
    95. Analytics Dashboards
    96. IoT Applications
    97. Real-Time Applications
    98. Logging Systems
    99. Event Data Storage
    100. AI Application Databases
    101. Multi-Tenant Systems
    102. Cloud-Native Applications
    103. Enterprise Architectures
    104. Production MongoDB Systems
    105. Large-Scale Database Design
    106. MongoDB Exercises
    107. CRUD Challenges
    108. Aggregation Challenges
    109. Data Modeling Challenges
    110. Query Optimization Tasks
    111. MongoDB Interview Questions
    112. Mock Database Interviews
    113. Real Production Scenarios
    114. Debugging Challenges
    115. Replication Challenges
    116. Performance Challenges
    117. Atlas Deployment Tasks
    118. Enterprise Database Assessments
    119. NoSQL Design Challenges
    120. Production Case Studies

    Docker(48 lessons)

    1. Docker Home
    2. What is Docker?
    3. Containers vs Virtual Machines
    4. Docker Architecture
    5. Installing Docker
    6. Hello World with Docker
    7. Essential Docker CLI
    8. Docker Desktop & Tooling
    9. Docker Images Explained
    10. Running Containers
    11. Container Lifecycle
    12. Exec & Attach
    13. Logs, Stats & Inspect
    14. Stopping & Cleaning Up
    15. Image Registries
    16. Docker Hub
    17. Dockerfile Basics
    18. Build Context & .dockerignore
    19. Layers & Build Cache
    20. Multi-Stage Builds
    21. ARG vs ENV
    22. HEALTHCHECK Instruction
    23. ENTRYPOINT vs CMD
    24. Building Lean Images
    25. Docker Networking Overview
    26. Bridge Networks & DNS
    27. Port Mapping & Exposure
    28. Volumes Overview
    29. Bind Mounts
    30. Named Volumes
    31. Advanced Networking
    32. Container DNS & Discovery
    33. Introduction to Docker Compose
    34. compose.yml in Depth
    35. Multi-Service Apps
    36. Environment Files & Secrets
    37. Scaling Services
    38. Docker Swarm Basics
    39. From Docker to Kubernetes
    40. Compose in Production
    41. Container Security Basics
    42. Image Vulnerability Scanning
    43. Managing Secrets
    44. Resource Limits
    45. Logging & Monitoring
    46. Docker in CI/CD
    47. Troubleshooting Docker
    48. Docker Interview Prep

    Python(52 lessons)

    1. Python Home
    2. What is Python?
    3. Installing Python
    4. Hello World
    5. Syntax & Indentation
    6. Variables & Assignment
    7. Data Types
    8. Operators
    9. Conditionals (if / elif / else)
    10. Loops (for / while)
    11. Functions
    12. Lambdas & Functional Tools
    13. Scope & Closures (LEGB)
    14. Recursion
    15. Comprehensions
    16. Generators & yield
    17. Lists
    18. Tuples
    19. Sets
    20. Dictionaries
    21. Strings
    22. Slicing & Indexing
    23. Sorting
    24. collections Module
    25. Classes & Objects
    26. Inheritance & MRO
    27. Dunder (Magic) Methods
    28. Properties & Encapsulation
    29. Modules & Imports
    30. Packages & Project Layout
    31. Virtual Environments
    32. pip & Dependency Management
    33. File I/O
    34. Exception Handling
    35. Decorators
    36. Context Managers
    37. Iterators & itertools
    38. Type Hints & mypy
    39. async / await
    40. Threads, Processes & GIL
    41. Testing with pytest
    42. Logging
    43. FastAPI — Web APIs
    44. Async Patterns (Queues, Backpressure, Cancellation)
    45. SQLAlchemy ORM & Transactions
    46. Python Security Essentials
    47. Data Science & ML Ecosystem
    48. NumPy & Pandas — Deep Dive
    49. Python System Design Patterns
    50. Packaging & Distribution
    51. Performance Optimization
    52. Python Interview Prep

    Kubernetes(90 lessons)

    1. Kubernetes Home
    2. What is Kubernetes?
    3. Kubernetes Architecture
    4. Installing Kubernetes
    5. kubectl Basics
    6. Pods
    7. ReplicaSets
    8. Deployments
    9. Services
    10. Namespaces
    11. Labels & Selectors
    12. ConfigMaps
    13. Secrets
    14. StatefulSets
    15. DaemonSets
    16. Jobs
    17. CronJobs
    18. Init Containers
    19. Sidecar Containers
    20. ClusterIP
    21. NodePort
    22. LoadBalancer
    23. Ingress
    24. Network Policies
    25. DNS in Kubernetes
    26. Volumes
    27. Persistent Volumes
    28. Persistent Volume Claims
    29. Storage Classes
    30. Dynamic Provisioning
    31. Resource Requests & Limits
    32. Probes (Liveness, Readiness, Startup)
    33. Taints & Tolerations
    34. Node Affinity
    35. Pod Affinity
    36. Pod Anti-Affinity
    37. Horizontal Pod Autoscaler
    38. Vertical Pod Autoscaler
    39. Cluster Autoscaler
    40. RBAC
    41. Service Accounts
    42. Security Contexts
    43. Pod Security Standards
    44. Secrets Management
    45. Image Security
    46. Logging
    47. Monitoring with Prometheus
    48. Grafana
    49. Metrics Server
    50. Alerts
    51. OpenTelemetry
    52. Helm
    53. Kustomize
    54. Operators
    55. CRDs
    56. Admission Controllers
    57. API Extensions
    58. Service Mesh
    59. Istio Basics
    60. Multi-Cluster Kubernetes
    61. EKS
    62. AKS
    63. GKE
    64. Managed Kubernetes Trade-offs
    65. CI/CD with Kubernetes
    66. GitOps
    67. ArgoCD
    68. FluxCD
    69. Blue-Green Deployment
    70. Canary Deployment
    71. Rolling Updates
    72. kubectl debug
    73. CrashLoopBackOff
    74. OOMKilled
    75. Pending Pods
    76. DNS Issues
    77. Networking Failures
    78. ImagePullBackOff
    79. Certificate Problems
    80. Deploy a Node.js App
    81. Deploy Spring Boot on Kubernetes
    82. Multi-tier E-Commerce Application
    83. GitOps Deployment Project
    84. Monitoring Stack Project
    85. Production Platform Project
    86. Kubernetes Master Interview Bank
    87. Kubernetes Interview (2-4 Years)
    88. Kubernetes Interview (5-8 Years)
    89. Kubernetes Interview (9-12 Years)
    90. Kubernetes Interview (Architect Level)

    Apache Kafka(100 lessons)

    1. Kafka Home
    2. What is Kafka?
    3. Kafka Use Cases
    4. Kafka Architecture
    5. Brokers
    6. Topics
    7. Partitions
    8. Offsets
    9. Producers
    10. Consumers
    11. Consumer Groups
    12. ZooKeeper vs KRaft
    13. Kafka CLI Basics
    14. Producer API
    15. Producer Configuration
    16. Serialization
    17. Acknowledgements
    18. Idempotent Producers
    19. Transactions
    20. Batching
    21. Compression
    22. Delivery Guarantees
    23. Consumer API
    24. Consumer Configuration
    25. Offset Management
    26. Rebalancing
    27. Manual Commit
    28. Auto Commit
    29. Parallel Consumers
    30. Error Handling
    31. Kafka Connect
    32. Source Connectors
    33. Sink Connectors
    34. Schema Registry
    35. Avro
    36. Protobuf
    37. JSON Schema
    38. Kafka Streams
    39. KStream
    40. KTable
    41. GlobalKTable
    42. State Stores
    43. Windowing
    44. Stream Joins
    45. Exactly Once Processing
    46. Topic Management
    47. Partition Strategy
    48. Replication
    49. ISR
    50. Leader Election
    51. Log Compaction
    52. Retention Policies
    53. Monitoring
    54. Metrics
    55. Scaling Kafka
    56. SSL
    57. SASL
    58. ACLs
    59. Authentication
    60. Authorization
    61. Encryption
    62. Secrets Management
    63. Consumer Lag
    64. Under Replicated Partitions
    65. Broker Failures
    66. Rebalance Issues
    67. Slow Consumers
    68. Message Loss
    69. Duplicate Events
    70. Cluster Recovery
    71. Multi-Cluster Kafka
    72. MirrorMaker
    73. Geo Replication
    74. Tiered Storage
    75. Performance Tuning
    76. Capacity Planning
    77. Event Sourcing
    78. CQRS
    79. Distributed Transactions
    80. Spring Kafka Introduction
    81. KafkaTemplate
    82. @KafkaListener
    83. Retry Topics
    84. Dead Letter Topics
    85. Error Handlers
    86. Transactions with Spring Kafka
    87. Testing Spring Kafka
    88. Order Processing System
    89. Payment Event Pipeline
    90. Notification Service
    91. Inventory Synchronization
    92. Audit Logging Platform
    93. Event-Driven E-Commerce
    94. Real-Time Analytics Dashboard
    95. Ride Sharing Event System
    96. Kafka Master Interview Bank
    97. Kafka Interview (0-2 Years)
    98. Kafka Interview (3-5 Years)
    99. Kafka Interview (6-9 Years)
    100. Kafka Architect Interview

    Design Patterns(70 lessons)

    1. Design Patterns Home
    2. What Are Design Patterns?
    3. The Gang of Four Legacy
    4. Why Patterns Are Not Silver Bullets
    5. Code Smells That Beg for Patterns
    6. Recognizing Change Points
    7. The Pattern Selection Framework
    8. OOP Recap for Pattern Thinkers
    9. SOLID Principles Overview
    10. Single Responsibility in Practice
    11. Open/Closed Principle
    12. Liskov Substitution
    13. Interface Segregation
    14. Dependency Inversion
    15. Composition Over Inheritance
    16. Singleton Pattern
    17. Singleton Pitfalls & Alternatives
    18. Factory Method
    19. Abstract Factory
    20. Builder Pattern
    21. Prototype Pattern
    22. Object Pool Pattern
    23. Dependency Injection vs Singleton
    24. Adapter Pattern
    25. Facade Pattern
    26. Decorator Pattern
    27. Proxy Pattern
    28. Composite Pattern
    29. Bridge Pattern
    30. Flyweight Pattern
    31. Structural Patterns in Microservices
    32. Strategy Pattern
    33. Observer Pattern
    34. Command Pattern
    35. State Pattern
    36. Template Method
    37. Iterator Pattern
    38. Chain of Responsibility
    39. Mediator Pattern
    40. Memento Pattern
    41. Visitor Pattern
    42. Behavioral Patterns in Event Systems
    43. Layered Architecture
    44. Hexagonal Architecture
    45. Clean Architecture
    46. Repository Pattern
    47. Unit of Work
    48. CQRS Pattern
    49. Event Sourcing
    50. Saga Pattern
    51. Outbox Pattern
    52. Circuit Breaker
    53. API Gateway Pattern
    54. Backend for Frontend (BFF)
    55. Strangler Fig Pattern
    56. Refactoring to Patterns
    57. When NOT to Use a Pattern
    58. Pattern Overengineering
    59. Testing Pattern-Based Code
    60. Patterns in Legacy Codebases
    61. Design Patterns Interview Strategy
    62. System Design + Patterns
    63. Mock Interview: Creational
    64. Mock Interview: Behavioral
    65. Pattern Vocabulary Cheat Sheet
    66. E-Commerce Checkout Architecture
    67. Notification System Design
    68. Payment Gateway Integration
    69. Multi-Tenant SaaS Patterns
    70. Final Capstone Review

    Design Principles(97 lessons)

    1. Design Principles Home
    2. What Are Design Principles?
    3. Principles vs Patterns
    4. Principles vs Rules
    5. When Principles Matter
    6. Code Quality Mindset
    7. Design Principles Myths
    8. SOLID Overview
    9. Single Responsibility Principle
    10. Open/Closed Principle
    11. Liskov Substitution Principle
    12. Interface Segregation Principle
    13. Dependency Inversion Principle
    14. SOLID in Practice
    15. DRY Principle
    16. KISS Principle
    17. YAGNI Principle
    18. Separation of Concerns
    19. Law of Demeter
    20. Composition Over Inheritance
    21. Program to Interface
    22. Principle of Least Astonishment
    23. High Cohesion, Low Coupling
    24. Immutability Principle
    25. Fail Fast
    26. Defensive Programming
    27. Tell, Don't Ask
    28. Information Hiding
    29. Encapsulation Deep Dive
    30. Pure Functions & Side Effects
    31. Stable Dependencies
    32. Acyclic Dependencies
    33. Common Closure Principle
    34. Common Reuse Principle
    35. Stable Abstractions Principle
    36. Orthogonality
    37. Locality of Behavior
    38. Dependency Management Principles
    39. Applying Principles Daily
    40. Principles in Code Review
    41. Principles in Legacy Code
    42. Capstone: Principles Refactor
    43. Design Principles Interview Framework
    44. Mock: SOLID Code Review
    45. Mock: Principle Trade-offs
    46. Design Principles Cheat Sheet
    47. Idempotency Principles
    48. Eventual Consistency Boundaries
    49. Saga Orchestration Principles
    50. Event-Driven Separation
    51. API Contract Principles
    52. Circuit Breaker Resilience
    53. CAP Theorem in Practice
    54. Microservice Decomposition
    55. Stripe API Design
    56. Netflix Engineering Culture
    57. Google Readability
    58. Amazon Operating Model
    59. Spotify Squad Model
    60. Architecture Review Process
    61. Review Readiness Checklist
    62. ADR Writing Mastery
    63. Design Review Facilitation
    64. Principle-Based Rubrics
    65. Architecture Review Anti-Patterns
    66. Strangler Fig Pattern
    67. Characterization Testing
    68. Seam Identification
    69. Incremental Extraction
    70. Legacy DIP Migration
    71. Monolith Decomposition
    72. Migration Rollback Strategy
    73. URL Shortener Principles
    74. Rate Limiter Principles
    75. Notification System Principles
    76. Feed System Principles
    77. Payment System Principles
    78. Chat System Principles
    79. Search System Principles
    80. LLM Boundary Design
    81. RAG Architecture Principles
    82. Prompt Engineering Separation
    83. AI Safety Guardrails
    84. Evaluation-Driven Design
    85. Human-in-the-Loop Principles
    86. Technical Leadership Principles
    87. Mentoring Through Principles
    88. Cross Team Standardization
    89. Principle-Driven RFCs
    90. Building Review Culture
    91. Staff Promotion Narrative
    92. Workshop: God Class
    93. Workshop: Dependency Inversion
    94. Workshop: Feature Envy
    95. Workshop: Long Parameter List
    96. Workshop: Switch Statements
    97. Workshop: Parallel Change

    System Design(48 lessons)

    1. System Design Home
    2. What Is System Design?
    3. Functional vs Non-Functional Requirements
    4. Requirements Clarification
    5. Back-of-Envelope Estimation
    6. API Design Fundamentals
    7. Trade-offs & Constraints
    8. Load Balancing
    9. Caching Layers
    10. CDN & Edge Computing
    11. SQL vs NoSQL
    12. Database Replication
    13. Message Queues
    14. Microservices Overview
    15. DNS & Networking Basics
    16. CAP Theorem
    17. Consistency & Availability
    18. Partitioning & Sharding
    19. Replication Strategies
    20. Distributed Consensus
    21. Idempotency & Deduplication
    22. Rate Limiting & Throttling
    23. Event-Driven Architecture
    24. Horizontal vs Vertical Scaling
    25. Read/Write Splitting
    26. Indexing & Query Optimization
    27. Data Warehousing & Analytics
    28. Search at Scale
    29. Blob & Object Storage
    30. Monitoring & Observability
    31. Fault Tolerance & Redundancy
    32. Disaster Recovery
    33. SLA, SLO & SLI
    34. Deployment & Release Strategies
    35. Security in Distributed Systems
    36. Design: URL Shortener
    37. Design: Twitter / News Feed
    38. Design: WhatsApp Messenger
    39. Design: Uber Ride-Sharing
    40. Design: Netflix Video Streaming
    41. Design: Instagram Photo Sharing
    42. Design: Dropbox File Storage
    43. Design: E-Commerce at Scale
    44. System Design Interview Framework
    45. Mock Interview: URL Shortener
    46. Mock Interview: Chat System
    47. Mock Interview: Rate Limiter
    48. System Design Cheat Sheet

    Microservices(47 lessons)

    1. Microservices Home
    2. What Are Microservices?
    3. Monolith vs Microservices
    4. When to Split the Monolith
    5. Bounded Contexts & DDD
    6. Team Topology & Conway's Law
    7. Microservices Myths & Anti-Patterns
    8. Service Boundaries
    9. Database-per-Service
    10. API Design for Services
    11. Sync vs Async Communication
    12. Service Granularity
    13. Twelve-Factor Services
    14. Shared Libraries Anti-Pattern
    15. Modular Monolith First
    16. REST in Microservices
    17. gRPC Service-to-Service
    18. Kafka as Event Backbone
    19. API Gateway Pattern
    20. Service Discovery
    21. Backend-for-Frontend (BFF)
    22. Contract Testing
    23. API Versioning
    24. Distributed Data Management
    25. Saga Orchestration
    26. Saga Choreography
    27. Outbox Pattern
    28. CQRS in Microservices
    29. Event Sourcing in Services
    30. Eventual Consistency
    31. Cross-Service Queries
    32. Circuit Breaker Pattern
    33. Retries & Exponential Backoff
    34. Bulkhead Pattern
    35. Timeouts & Deadlines
    36. Distributed Tracing
    37. Health Checks & Readiness
    38. Chaos Engineering
    39. Strangler Fig Pattern
    40. Branch by Abstraction
    41. Decomposition Strategy
    42. Capstone: E-Commerce Services
    43. Microservices Interview Framework
    44. Mock: Decompose a Monolith
    45. Mock: Order Saga Design
    46. Mock: Service Communication
    47. Microservices Cheat Sheet

    Enterprise Architecture Patterns(65 lessons)

    1. Enterprise Architecture Patterns Home
    2. What Makes Good Architecture
    3. Quality Attributes
    4. Scalability
    5. Availability
    6. Reliability
    7. Maintainability
    8. Observability
    9. Architectural Trade-offs
    10. Architecture Decision Records
    11. Strategic Design
    12. Bounded Contexts
    13. Ubiquitous Language
    14. Aggregates
    15. Entities
    16. Value Objects
    17. Domain Events
    18. Repositories
    19. Modular Monolith
    20. Layered Architecture
    21. Hexagonal Architecture
    22. Clean Architecture
    23. Onion Architecture
    24. Service Decomposition
    25. Database Per Service
    26. Shared Database Anti-Pattern
    27. API Gateway
    28. Backend For Frontend
    29. Service Discovery
    30. Service Registry
    31. Saga Pattern
    32. Outbox Pattern
    33. CQRS
    34. Event Sourcing
    35. Distributed Transactions
    36. Idempotency
    37. Retry Pattern
    38. Circuit Breaker
    39. Bulkhead
    40. Rate Limiting
    41. Event Brokers
    42. Kafka
    43. RabbitMQ
    44. Event Streaming
    45. Choreography
    46. Orchestration
    47. Kubernetes Patterns
    48. Sidecar
    49. Ambassador
    50. Adapter
    51. Service Mesh
    52. Istio
    53. Strangler Fig
    54. Branch By Abstraction
    55. Anti Corruption Layer
    56. Legacy Modernization
    57. Shared Database
    58. Shared Schema
    59. Separate Schema
    60. Separate Database
    61. Tenant Isolation
    62. Staff Engineer Interviews
    63. System Design Interviews
    64. Architecture Trade-offs
    65. Architecture Whiteboarding

    Career Roadmaps(46 lessons)

    1. Career Roadmaps Home
    2. How to Use Career Roadmaps
    3. Engineering Levels Explained
    4. Skills vs Credentials
    5. Learning Strategies for Engineers
    6. Building Career Momentum
    7. Career Roadmap Myths
    8. Frontend Developer Roadmap
    9. Backend Developer Roadmap
    10. Fullstack Developer Roadmap
    11. Java / Spring Career Path
    12. Python Backend Career Path
    13. DevOps / SRE Roadmap
    14. Data Engineer Roadmap
    15. ML / AI Engineer Roadmap
    16. SDET / Automation Roadmap
    17. Platform Engineer Roadmap
    18. DSA Interview Track
    19. System Design Career Track
    20. Open Source Strategy
    21. Side Projects That Get You Hired
    22. Certifications Worth It
    23. Technical Writing & Personal Brand
    24. Networking for Engineers
    25. Mentorship & Sponsorship
    26. Resume for Engineers
    27. LinkedIn Optimization
    28. Portfolio & GitHub
    29. Job Application Strategy
    30. Referral Playbook
    31. Recruiter Screen
    32. Behavioral Interview (STAR)
    33. Offer Evaluation
    34. Salary Negotiation
    35. First 90 Days
    36. Junior to Mid Transition
    37. Mid to Senior Transition
    38. Senior to Staff Transition
    39. Tech Lead vs Staff
    40. Switching Companies
    41. Capstone: 12-Month Career Plan
    42. Career Planning Framework
    43. Mock: Career Coaching Session
    44. Mock: Switching Career Tracks
    45. Promotion Package Prep
    46. Career Roadmaps Cheat Sheet