avatarPrabhash

Summary

The content provides a comprehensive list of interview questions for a Java, Spring Boot, and Microservices Engineer position, covering a range of topics from OOPs and functional programming to specific Java versions, Spring Boot features, and microservices architecture.

Abstract

The article is a guide for candidates preparing for a technical interview for a Java, Spring Boot, and Microservices Engineer role. It outlines 35 key interview questions that span various aspects of Java programming, including object-oriented principles, functional programming concepts, new features in Java 8, 11, and 17, JVM memory management, garbage collection, and core Java concepts like equals() and hashCode(). The questions also delve into design patterns, Spring Boot specifics such as starters, annotations, environment configurations, JPA, and the differences between AOT and JIT compilation. Additionally, the article covers microservices architecture, when to use or avoid it, and associated methodologies like DDD, TDD, and BDD. It touches on pair-programming, cloud experience, deployment strategies, and the latest features of Spring Boot 3, including migration considerations. The article concludes with questions about containerization, orchestration tools like Kubernetes, and encourages candidates to engage with the interviewers by asking their own questions.

Opinions

  • The article implies that understanding the progression of Java and its latest features is crucial for candidates.
  • It suggests that a deep knowledge of both object-oriented and functional programming paradigms is expected for the position.
  • The inclusion of questions about design patterns indicates their importance in the role of a Java, Spring Boot, and Microservices Engineer.
  • The article emphasizes the significance of being familiar with Spring Boot's ecosystem, including its annotations and deployment configurations.
  • It conveys that practical experience with microservices, cloud platforms, and deployment processes is highly valued.
  • The mention of pair-programming and mob-programming hints at a collaborative work environment.
  • The recommendation of an AI service, ZAI.chat, as a cost-effective alternative to ChatGPT Plus, suggests a preference for efficient and economical tools in the tech industry.

35 very important interview questions

For Java, Spring Boot, Microservices Engineer Position

Java Spring Boot Interview Questions - Logo
  1. Explain OOPs with benefits.
  2. What is Functional Programming ?
  3. How is FP different from OOPs and when should we use it ?
  4. List all the new features of Java 8, Java 11, and Java 17 that you’ve used.
  5. Where do you think Java is progressing towards ?
  6. How stream works ?
  7. Difference between map() and flatMap() in streams.
  8. Explain Consumer, Supplier, Function, and Predicate.
  9. Explain JVM Memory Map for different versions.
  10. How Garbage Collector works and which gc is default in different versions ?
  11. Explain equals() and hashCode() methods.
  12. Difference between interface and abstract class.
  13. How to make a class immutable ?
  14. Which all design patterns you have worked on, explain them.
  15. Difference between AOT and JIT compiler.
  16. What is Spring Boot and why should we use it ?
  17. What is difference between a starter and normal dependency ?
  18. Which all annotations you’ve used, explain them.
  19. How do you handle different environment deployments in Spring Boot ?
  20. What is JPA ?
  21. How to connect to multiple databases using JPA ? What about read-write replica of same database.
  22. What does different annotations do ? For example : @SpringBootApplication or @ComponentScan
  23. What is DI and IOC ?
  24. What is Microservices ? When should we use it ?
  25. When should we not use Microservices ? Share Example.
  26. What is DDD, TDD, and BDD ?
  27. Do you have experience in pair-programming or mob-programming ?
  28. Explain a situation where you had to go against your manager or team. How did you manage it ? Did you convince them or they convinced you.
  29. Do you have experience with clouds ? Which all components you have used and why ?
  30. How do you deploy your code in different environments ?
  31. New features of Spring Boot 3.
  32. How do we migrate to Spring Boot 3 ? any specific prerequisites.
  33. Do you have experience with Containers, and Orchestration tools ?
  34. What is different component of Kubernetes ?
  35. Do you have any question for us ?
Java
Spring Boot
Interview
Interview Questions
Programming
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