I recently went through four rounds of interviews. Here’s a breakdown of each round: First Round: Technical Basics (Java 7, Java 8, and SQL) This round tested my technical knowledge in: Java Basics: Questions on Strings, Collections, Exception Handling, and Functional Interfaces. Java 8 Features: They asked me about lambda expressions and Stream API. SQL: They tested my SQL skills, like writing queries and understanding joins. Second Round: Project-Based Discussion This was all about the projects I’ve worked on. They asked about the challenges I faced. I explained which modules I handled and my contributions. I shared how I resolved technical and functional problems during the development phase. Third Round: Spring Boot and Microservices This round focused on Spring Boot and microservices-related topics: Exception Handling: How to handle exceptions in Spring Boot. Logging: Best practices for logging in a Spring Boot application. Microservices: Questions on architecture, inter-service communication, and REST APIs. Annotations: They tested my knowledge of important annotations like @RestController, @Autowired, and @Transactional. 4. Final Round: Design Patterns This round was all about design patterns. They asked which design patterns I’ve used in my projects. I explained my experience with Singleton and Factory patterns. I was asked to implement the Singleton pattern with these requirements: It should be thread-safe. It should use lazy initialization.