Spring Boot interview questions
Study 10 topics in order — from setup and basics to the questions interviewers actually ask. Answers include code, tables, and a short speaking tip.
Spring Boot Basics & Core Concepts
Get started with Spring Boot. Understand auto-configurations, application properties, and running frameworks.
Building REST APIs with Spring Boot
Design REST endpoints. Learn route mappings, request body mappings, JSON responses, status code configs, and c...
Spring Data JPA & Database Integration
Integrate Hibernate and JPA. Master repository interfaces, query methods, transactional boundaries, entity map...
Spring Security (Authentication & Authorization)
Secure Spring apps. Learn security filter chains, custom user details, JWT authentications, OAuth2, and passwo...
Dependency Injection & Bean Lifecycle
Master Spring IoC container. Learn bean definitions, autowiring, component scopes, circular dependencies, and...
Spring Boot Testing (JUnit, Mockito & Test Slices)
Test Spring boot applications. Master unit test mocks with Mockito, integration tests, and @WebMvcTest slices.
Microservices with Spring Cloud
Build cloud microservices. Understand service discovery (Eureka), API gateways, configuration services, and re...
Caching, Async & Scheduling
Learn caching strategies using Redis, asynchronous execution with @Async, and cron scheduling using Spring's @...
Message Brokers and Event-Driven Architecture
Build event-driven apps using RabbitMQ or Kafka. Understand publisher-subscriber architectures, consumer queue...
Performance Optimization, Monitoring & DevOps
Monitor and deploy Spring Boot. Learn Actuator metrics, profiling, Docker configurations, garbage collection,...