AWS Cloud & DevOps Tutorial 0/70 lessons ~6 min read Lesson 70“IAM, VPC, EC2, Lambda, ECS, EKS, Terraform, CI/CD, and AWS operations”

AWS Cloud and DevOps Practical Interview Preparation

Lesson 69 trained system design shape; this final lesson prepares you for **practical Cloud/DevOps interview loops**: live troubleshooting scenarios, whiteboard/ops drills, IAM and

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Focus

15 guided sections

Practice signal

Examples included

Career prep

Interview Q&A included

AWS Cloud and DevOps Practical Interview Preparation

AWS Cloud & DevOps Engineering · Lesson 70 · Production Projects and Interview

Lesson Overview

Lesson 69 trained system design shape; this final lesson prepares you for practical Cloud/DevOps interview loops: live troubleshooting scenarios, whiteboard/ops drills, IAM and networking puzzles, CI/CD and Kubernetes questions, STAR-format operational stories, a mock interview pack, and a multi-week study plan. TechLearningPro’s Projects 1–5 become your evidence library. This course does not claim that completing it places any AWS certification or guarantees a job—those depend on your practice, employers, and current exam objectives you verify yourself.

Continuity: full course 1–69 with emphasis on Modules 3–6 and projects 64–68. Tag prep notes Project=tlp-lesson70. Prefer whiteboard and tabletop over expensive always-on labs; when you lab, budgets and cleanup still apply.

Learning Objectives

Run troubleshooting scenarios with hypothesis-driven debugging.
Answer IAM, VPC, and networking questions with diagrams.
Explain CI/CD gates, rollback, and supply-chain controls.
Discuss ECS vs EKS operations at interview depth.
Deliver STAR stories for outages, migrations, and cost saves.
Whiteboard a deploy pipeline and an incident timeline.
Complete a mock interview pack with scoring.
Build a 4-week study plan mapped to weak areas.
Capstone walkthrough of your portfolio in 10 minutes.
Avoid certification placement claims and invented APIs.
Practice behavioral questions for on-call culture.
Diagnose “site is down” with ordered checks.
Explain least privilege examples from your projects.
Discuss FinOps questions with tags/budgets language.
Prepare questions to ask interviewers about platform maturity.
Handle take-home labs ethically (no secret exfiltration).
Timebox answers; signal structure.
Map each STAR story to a project artifact.
Review Well-Architected language without parroting.
Close the course with a personal readiness checklist.

Prerequisites

Lessons 69 method; projects evidence folders.
Ability to draw VPC/IAM/pipeline diagrams.
Optional peer interviewer.

Detailed Core Concepts

Practical loop formats

Design (lesson 69).
Debug (logs/metrics narrative).
Deep dive past project.
Behavioral / STAR.
Live coding light (IAM policy reading, Dockerfile review, Terraform snippet critique)—not leetcode-heavy for many DevOps roles, but varies by employer.

Troubleshooting method

Define user symptom.
Establish blast radius.
Check change timeline (deploys, IAM, network).
Inspect golden signals.
Form 2–3 hypotheses; test cheapest first.
Mitigate; then root cause.
Follow up with postmortem actions.

Scenario bank (drill aloud)

S1: ALB 502s after deploy → target health, SG, health path, task crash.
S2: Lambda timeouts → dependency latency, VPC ENI, cold start, SDK retries.
S3: DynamoDB throttling → hot partition, capacity mode, retry storms.
S4: Cannot pull ECR → execution role, endpoints, KMS.
S5: AccessDenied on Terraform → SCP, missing IAM, wrong account.
S6: NAT cost spike → traffic path, endpoints opportunity.
S7: DLQ depth rising → poison message, schema change.
S8: Cross-account assume-role fails → trust policy, external ID, MFA.
S9: Certificate expiry at edge → ACM, DNS validation.
S10: Node/kube pending (if EKS) → capacity, taints, CNI—stay high-level unless experienced.

STAR for ops stories

Situation: exam-week traffic.
Task: restore enrollment API.
Action: rolled back task definition; added alarm on unhealthy hosts; ADR for blue/green.
Result: recovered in N minutes; error budget; action items shipped.
Quantify with your real lab/game-day numbers—do not invent production heroics.

Study plan (4 weeks — adapt)

Week 1: Foundations redraw—VPC, IAM, storage; flashcards; one debug scenario daily.
Week 2: Containers + serverless projects review; pipelines; one design mock (lesson 69).
Week 3: Observability/DR stories; landing zone talking points; two STAR stories polished.
Week 4: Full mock pack; capstone portfolio walkthrough; rest before interviews.
Optional cert study is separate: read current AWS exam guides yourself; this lesson makes no placement claims.

Capstone walkthrough script (10 minutes)

Business problem TechLearningPro faces (1 min).
Project 1 HA shape (1).
Project 2 ECS CI/CD + rollback evidence (2).
Project 3 async orders + DLQ (2).
Project 4 account boundaries (1).
Project 5 SLO/game day (2).
What you’d do next / known risks (1).

Whiteboarding tips

Large boxes first; label AZ; write assumptions in a corner; narrate as you draw; leave space for deep dive; never apologize for erasing.

Questions for them

How are environments separated? What’s the deploy frequency? Who owns pager? What’s the multi-account maturity? How do you measure platform success?

Architecture and Design Diagrams

mermaid
flowchart TB
  Prep[Study plan] --> Mocks[Design + debug mocks]
  Mocks --> Stories[STAR stories]
  Stories --> Cap[Portfolio capstone]
  Cap --> Loop[Interview loop]
  Loop --> Retro[Retrospective notes]

mermaid
flowchart LR
  Symptom[User symptom] --> Radius[Blast radius]
  Radius --> Changes[Recent changes]
  Changes --> Signals[Golden signals]
  Signals --> Hyp[Hypotheses]
  Hyp --> Mitigate[Mitigate]
  Mitigate --> RCA[Root cause]

mermaid
flowchart TB
  S[Situation] --> T[Task]
  T --> A[Action]
  A --> R[Result + evidence]

Technical Explanation

IAM interview depth

Explain identity vs permissions vs resource policies; permission boundaries at a concept level; why task role ≠ execution role (Project 2); OIDC for GitHub; SCPs as ceilings. Draw a trust relationship verbally.

Networking interview depth

Public vs private subnets; SG stateful vs NACL; route tables; VPC endpoints why; TGW when many VPCs. For “can these talk?” questions, walk hop by hop.

CI/CD interview depth

Stages; gates; secrets; immutable artifacts; environment promotion; rollback. Cite Project 2 scan gate and Project 3 deploy.

Kubernetes interview depth (if asked)

Control plane vs data plane; IRSA concept; GitOps (lesson 62); when you chose ECS instead—honesty scores points.

Behavioral pitfalls

Blaming coworkers; claiming certs as proof of skill; fabricating metrics; refusing to admit trade-offs.

Take-homes

Run in sandbox; no customer data; document assumptions; include destroy steps; don’t invent APIs to look advanced.

Mock interview pack (run this)

45-min design (P2 from lesson 69).
20-min debug (S1 or S7).
15-min project deep dive.
15-min STAR (outage + cost).
10-min candidate questions.
Score with lesson 69 rubric + story clarity 1–5.

Practical Implementation or Design Walkthrough

Problem

Complete a mock interview pack and capstone walkthrough using TechLearningPro evidence.

Steps

Assemble evidence index linking lessons 64–68 artifacts.
Write two STAR stories on paper; time to 90 seconds each.
Schedule peer mock using pack above.
Record design segment; scrub for invented APIs.
Redraw VPC+IAM from memory; correct against notes.
Execute one live lab debug only if needed; budget+cleanup.
Finalize 4-week plan calendar.
Capstone dry run to a friend.
List five questions for employers.
Personal readiness checklist signed.

Enterprise Real-World Scenarios

Cert-only candidate

Lists certifications, cannot debug 502. Interview ends. Fix: scenarios + portfolio.

Hero narrative without team

STAR ignores collaboration and process. Fix: include IC role and action items.

Oversharing production secrets

Pastes internal keys in take-home. Automatic fail. Fix: redact; use labs.

Freezing on whiteboard

No method. Fix: spine from lesson 69 + symptom method here.

Arguing the interviewer

Defending a wrong SG mental model. Fix: think aloud; accept correction.

Best Practices

Evidence over claims.
Structured debugging.
Timed STAR stories.
Honest ECS vs EKS.
Separate cert study from this plan.
Peer mocks weekly near interviews.
Destroy lab leftovers.
Ask mature platform questions.
Redact secrets always.
Quantify with real drills.
Sleep before loops.
Keep a brag document of projects.
Review IAM/VPC diagrams cold.
Practice summarizing in 60 seconds.
Retrospective after every mock.

Common Mistakes and Anti-Patterns

Certification placement claims.
Invented APIs/CLI flags.
No portfolio artifacts.
Blameless-sounding blame.
Skipping networking basics.
Ignoring cost questions.
Unprepared questions for them.
Take-homes without cleanup.
Memorized scripts that ignore prompts.
Overbuilding whiteboard designs.

Troubleshooting and Design Review

Symptom	Cause	Action
Blank on debug	No method	Use symptom checklist
STAR ramble	No timing	90-second hard cap
Weak IAM answers	Never drew trusts	Drill Project 2/4 roles
Design overstuffed	Nervous	Spine nouns only
Low confidence	No mocks	Schedule pack
Lab bill spike	Idle resources	Cleanup + budgets

Interview Questions and Answers

Q1: Tell me about a production incident. A: STAR with detection, mitigation, actions—use game day if no prod.
Q2: How debug ALB 502? A: Targets, health, SG, app logs, recent deploy.
Q3: Execution vs task role? A: Agent vs app permissions.
Q4: Why multi-account? A: Blast radius, governance, billing.
Q5: CI/CD security? A: OIDC, scans, least privilege, immutable tags.
Q6: ECS vs EKS? A: Ops complexity vs k8s needs.
Q7: How ensure DR? A: Define RTO/RPO; restore drills.
Q8: Cost optimization example? A: Endpoints vs NAT; rightsizing; destroy idle.
Q9: Idempotency? A: Orders project conditional writes.
Q10: SCP vs IAM? A: Ceiling vs grants.
Q11: What do you page on? A: SLI symptoms, not vanity CPU.
Q12: How learn new AWS service? A: Docs first; small lab; ADR; cleanup.
Q13: Conflict on design? A: RFC/ADR; revisit date.
Q14: Questions for us? A: Account strategy, deploy freq, pager ownership.
Q15: Course outcome honesty? A: Skills+portfolio evidence—not a job or cert placement guarantee.

Hands-On Exercises

Exercise: Mock interview pack and capstone walkthrough

Deliverable: Scored mock pack, STAR stories, study plan, capstone script, cleanup of any leftover interview labs.

Challenge ADR

If interview prep time is only two weeks, cut Week 2 container rebuild labs and prioritize debug scenarios + STAR + one design mock; ADR the compressed plan.

Lab evidence checklist

mock pack scores, two STAR scripts, capstone outline, study calendar, readiness checklist; budget/cleanup confirmation.

Narrative: A candidate turned Project 5’s game day into a STAR story with timestamps and action items—and outperformed peers who only listed service names

A candidate turned Project 5’s game day into a STAR story with timestamps and action items—and outperformed peers who only listed service names.

Continuity

Closes Module 6 and the course; continue practicing with Projects 64–68 evidence and lesson 69 rubrics.

Deep dive: ADR template (TechLearningPro)

text
# ADR-NNNN: Title
Date:
Status: Proposed | Accepted | Deprecated | Superseded by ADR-XXXX
Context:
Decision:
Consequences:
Evidence / links:

Deep dive: Portfolio README skeleton

text
TechLearningPro Project — Lesson 70
- Problem / NFRs
- Architecture (diagram + service rationale)
- Repo layout
- Deploy / destroy
- Security checklist
- Observability
- Failure tests
- Cost notes (illustrative; verify pricing)
- ADRs

Deep dive: Budget and tagging

Create or verify a budget with email/SNS subscriber before any apply. Tag Project=tlp-lesson70, Owner=<you>, Environment=lab. Screenshot Cost Explorer filtered by tag after destroy to prove idle cost returned near zero (allow for delayed billing).

Extended enterprise scenario: acquisition pressure

Leadership wants the lab promoted as “production-ready marketing copy.” Refuse without PRR evidence from lesson 63, WAR risks from lesson 58, and failure-test artifacts from this lesson.

Extended enterprise scenario: disputed decision

Two senior engineers disagree on the primary architecture choice. Run a timeboxed RFC, record ADR with revisit date, and keep the rejected alternative documented so interviews and audits see the trade-off—not silence.

Extended practice scenario 1 — 70 aws cloud and devops practical interview preparation

Confirm AWS Budgets alerts exist for the sandbox; tag every resource Project=tlp-lesson70. Do not proceed without a budget subscriber.

In a timed drill for AWS Cloud and DevOps practical interview preparation at TechLearningPro, implement or design the core lab with a partner observing. The observer's job is to stop any step that invents API flags, hardcodes secrets, invents pricing numbers presented as current quotes, or skips budget and cleanup. After the drill, rewrite your ADR in ten lines: context, decision, consequences. Attach evidence: mock pack scores, two STAR scripts, capstone outline, study calendar, readiness checklist, and destroy confirmation for any lab resources.

Closes Module 6 and the course; continue practicing with Projects 64–68 evidence and lesson 69 rubrics.

Finally, teach back the lesson overview paragraph from memory, then check against the text. Gaps become flashcards. Premium courses finish when you can operate under time pressure without treating AWS Cloud and DevOps practical interview preparation as a mystery.

Extended practice scenario 2 — 70 aws cloud and devops practical interview preparation

Document the lesson's primary architecture decision in a ten-line ADR: context, decision, status, consequences.

Closes Module 6 and the course; continue practicing with Projects 64–68 evidence and lesson 69 rubrics.

Extended practice scenario 3 — 70 aws cloud and devops practical interview preparation

Map identity paths: who can create/modify the resources in this lesson; which IAM roles are least privilege.

Closes Module 6 and the course; continue practicing with Projects 64–68 evidence and lesson 69 rubrics.

Extended practice scenario 4 — 70 aws cloud and devops practical interview preparation

Design observability: CloudWatch metrics/alarms or equivalent signals that prove the control works.

Closes Module 6 and the course; continue practicing with Projects 64–68 evidence and lesson 69 rubrics.

Extended practice scenario 5 — 70 aws cloud and devops practical interview preparation

Run or design a negative test: denied access, misconfiguration, or failed dependency—capture evidence.

Closes Module 6 and the course; continue practicing with Projects 64–68 evidence and lesson 69 rubrics.

Extended practice scenario 6 — 70 aws cloud and devops practical interview preparation

Estimate cost dimensions for this lesson's activities. Label figures illustrative; verify pricing pages with dates.

Closes Module 6 and the course; continue practicing with Projects 64–68 evidence and lesson 69 rubrics.

Extended practice scenario 7 — 70 aws cloud and devops practical interview preparation

Produce a cleanup checklist and execute destroy for any billable lab resources created for lesson 70.

Closes Module 6 and the course; continue practicing with Projects 64–68 evidence and lesson 69 rubrics.

Extended practice scenario 8 — 70 aws cloud and devops practical interview preparation

Cross-link prior course lessons that this design depends on; list two failure modes inherited from those layers.

Closes Module 6 and the course; continue practicing with Projects 64–68 evidence and lesson 69 rubrics.

Extended practice scenario 9 — 70 aws cloud and devops practical interview preparation

Security review: encryption at rest/in transit, public exposure checks, CloudTrail visibility for management events.

Closes Module 6 and the course; continue practicing with Projects 64–68 evidence and lesson 69 rubrics.

Extended practice scenario 10 — 70 aws cloud and devops practical interview preparation

Reliability review: failure injection, rollback path, how detection and recovery work.

Closes Module 6 and the course; continue practicing with Projects 64–68 evidence and lesson 69 rubrics.

Extended practice scenario 11 — 70 aws cloud and devops practical interview preparation

Performance review: throughput, latency, or scaling limits relevant to AWS Cloud and DevOps practical interview preparation at TechLearningPro.

Closes Module 6 and the course; continue practicing with Projects 64–68 evidence and lesson 69 rubrics.

Extended practice scenario 12 — 70 aws cloud and devops practical interview preparation

Write a runbook section for on-call: symptoms, first three diagnostic steps, escalation, rollback.

Closes Module 6 and the course; continue practicing with Projects 64–68 evidence and lesson 69 rubrics.

Extended practice scenario 13 — 70 aws cloud and devops practical interview preparation

Config/compliance angle: which controls must be true before production promotion.

Closes Module 6 and the course; continue practicing with Projects 64–68 evidence and lesson 69 rubrics.

Extended practice scenario 14 — 70 aws cloud and devops practical interview preparation

Multi-account consideration: how this workload sits in landing-zone OU boundaries from lessons 48–49 and 67.

Closes Module 6 and the course; continue practicing with Projects 64–68 evidence and lesson 69 rubrics.

Extended practice scenario 15 — 70 aws cloud and devops practical interview preparation

Interview drill: explain AWS Cloud and DevOps practical interview preparation at TechLearningPro to a hiring manager in three minutes without inventing APIs.

Closes Module 6 and the course; continue practicing with Projects 64–68 evidence and lesson 69 rubrics.

Extended practice scenario 16 — 70 aws cloud and devops practical interview preparation

Pair review: partner stops any invented CLI flags, hardcoded secrets, or fake current prices.

Closes Module 6 and the course; continue practicing with Projects 64–68 evidence and lesson 69 rubrics.

Extended practice scenario 17 — 70 aws cloud and devops practical interview preparation

FinOps continuity from lesson 47: idle resources, data transfer, and when to decommission lab stacks.

Closes Module 6 and the course; continue practicing with Projects 64–68 evidence and lesson 69 rubrics.

Extended practice scenario 18 — 70 aws cloud and devops practical interview preparation

DR continuity from lesson 45 and 68: recoverability must survive the change you are shipping.

Closes Module 6 and the course; continue practicing with Projects 64–68 evidence and lesson 69 rubrics.

Extended practice scenario 19 — 70 aws cloud and devops practical interview preparation

Produce evidence pack: diagrams, configs, test results, cleanup proof.

Closes Module 6 and the course; continue practicing with Projects 64–68 evidence and lesson 69 rubrics.

Extended practice scenario 20 — 70 aws cloud and devops practical interview preparation

Challenge constraint: tighter monthly budget—what do you sequence differently?

Closes Module 6 and the course; continue practicing with Projects 64–68 evidence and lesson 69 rubrics.

Extended practice scenario 21 — 70 aws cloud and devops practical interview preparation

Challenge constraint: stricter compliance—what evidence gates promotion?

Closes Module 6 and the course; continue practicing with Projects 64–68 evidence and lesson 69 rubrics.

Extended practice scenario 22 — 70 aws cloud and devops practical interview preparation

Challenge constraint: shorter maintenance window—what pre-staging changes?

Closes Module 6 and the course; continue practicing with Projects 64–68 evidence and lesson 69 rubrics.

Extended practice scenario 23 — 70 aws cloud and devops practical interview preparation

Teach-back: recite the Lesson Overview paragraph, then check against the text; flashcard gaps.

Closes Module 6 and the course; continue practicing with Projects 64–68 evidence and lesson 69 rubrics.

Extended practice scenario 24 — 70 aws cloud and devops practical interview preparation

Dress rehearsal: tabletop under a timer with observer notes.

Closes Module 6 and the course; continue practicing with Projects 64–68 evidence and lesson 69 rubrics.

Extended practice scenario 25 — 70 aws cloud and devops practical interview preparation

Final synthesis note: one paragraph connecting AWS Cloud and DevOps practical interview preparation at TechLearningPro to TechLearningPro production ownership.

Closes Module 6 and the course; continue practicing with Projects 64–68 evidence and lesson 69 rubrics.

Compliance evidence pack for auditors / platform leads

Budget configs, tagging proof (Project=tlp-lesson70), architecture diagram, ADR, negative-test evidence, encryption settings notes, CloudTrail/Config references where applicable, pricing-page retrieval dates for any dollar claims, cleanup confirmation.

Glossary drill

Review every bold term introduced in Detailed Core Concepts and Interview Q&A. Write one sentence definitions from memory; correct against the lesson. Unfamiliar AWS console navigation becomes a lab note, not a guess. Focus terms: STAR, hypothesis-driven debug, capstone walkthrough, study plan, no cert placement claims.

Budget and cleanup sworn statement

I verified budgets remain enabled with alert subscribers. I deleted or scheduled deletion for orphan lab resources from lesson 70 named ____. I labeled every savings or cost figure with pricing-page retrieval dates or marked it illustrative. Signed ________ date ________.

Interview story to memorize

Craft a 60-second story: TechLearningPro needed AWS Cloud and DevOps practical interview preparation; you chose a design with explicit trade-offs; you proved it with tests; you governed cost with budgets and tags; you left an ADR so the next engineer does not reverse the decision blindly. Deliver the 10-minute capstone spine.

Self-assessment rubric

Area	Weight
Conceptual accuracy and service selection	20%
Working design/lab and reproducibility	25%
Security and least-privilege	20%
Reliability, observability, troubleshooting	20%
Documentation, ADR, cleanup	15%

Final synthesis before summary

Mastery of AWS Cloud and DevOps practical interview preparation at TechLearningPro is not logo recognition—it is owning failure modes, cost meters, identity boundaries, and the written decision that keeps TechLearningPro coherent under change.

Extended facilitation script (print for guild leads)

Open with readiness checklist. Ban cert placement claims. Run one debug cold. End course by scheduling the first post-course weekly mock.

Deep dive: Weekly mock cadence after the course

Keep one 60-minute mock each week for a month after finishing: alternate design (lesson 69) and debug (this lesson). Log scores in a spreadsheet. Weak IAM weeks get diagram redraws; weak ops weeks get STAR rewrites. TechLearningPro alumni who treat interviews as a practiced sport outperform one-time crammers.

Lesson Summary

Practical interview prep turns TechLearningPro’s projects into debug narratives, STAR stories, whiteboard fluency, and a disciplined study plan—without certification placement claims. Tag Project=tlp-lesson70. You now close the AWS Cloud & DevOps Engineering course with operable portfolio proof and interview methods you can rehearse.

Course complete: revisit weak modules using the study plan; keep destroying idle labs; keep writing ADRs.