Spring Boot Quiz

Introduction

Twenty rapid-fire questions across the course. Try to answer in one or two sentences each — that's the depth a senior interview expects.

Understanding the topic

Sample questions:

• What does @SpringBootApplication compose?
• Why prefer constructor injection?
• Difference between @RestController and @Controller?
• How does @Transactional roll back on checked exceptions?
• What is the N+1 problem and three ways to fix it?
• Sessions vs JWT — when to pick which?
• What does Resilience4j's circuit breaker actually measure?
• Outbox pattern — what problem does it solve?
• Liveness vs readiness probes?
• Virtual threads — when do they help, when don't they?