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6,038 java senior interview questions shared by candidates

Q1. What is the difference between strong, weak and soft references in Java? Q2. What is the role of the volatile keyword in Java and how does it work? Q3. How do you implement pagination in SQL queries? Q4. Discuss how security can be maintained in a serverless architecture. Q5. How can caching improve application performance and what are some strategies to implement it? Q6. What is the difference between synchronous and asynchronous communication between microservices? Q7. What are the challenges of achieving data consistency in distributed systems and how to resolve those? Q8. What are the advantages of using Docker for application deployment? Q9. What are some common use cases for the Executor framework in Java? Q10. What are the benefits of using functional interfaces and Lambdas in Java? Q11. Can you explain the role of the Command pattern in software design? Q12. How does the Spring Framework support dependency injection? Q13. What is the purpose of the Java Memory Model (JMM)? Q14. Can you explain the key concepts behind an Event-Driven Architecture and its use cases? Q15. What is the role of reactive programming in Java and how is it implemented using Spring Reactor? Q16. What is the role of annotations in Java EE applications? Q17. How is dependency injection implemented in Spring Boot applications? Q18. What are the key differences between SQL and NoSQL databases? Q19. What is the difference between a HashMap and ConcurrentHashMap? Q20. How do you handle versioning in RESTful APIs? Q21. What is the role of Docker Compose in containerized applications? Q22. Can you explain the concept of HATEOS (Hypermedia as the Engine of Application State) in the context of REST APIs? Q23. Can you explain the role and benefits of the CyclicBarrer class in java and provide examples of its typical use cases? Q24. How can you ensure that a Spring Data JPA application is optimized for performance? Q25. What are some best practices for RESTful API design?
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Senior Java Developer

Interviewed at Andersen Lab

4.4★
Mar 14, 2025

Q1. What is the difference between strong, weak and soft references in Java? Q2. What is the role of the volatile keyword in Java and how does it work? Q3. How do you implement pagination in SQL queries? Q4. Discuss how security can be maintained in a serverless architecture. Q5. How can caching improve application performance and what are some strategies to implement it? Q6. What is the difference between synchronous and asynchronous communication between microservices? Q7. What are the challenges of achieving data consistency in distributed systems and how to resolve those? Q8. What are the advantages of using Docker for application deployment? Q9. What are some common use cases for the Executor framework in Java? Q10. What are the benefits of using functional interfaces and Lambdas in Java? Q11. Can you explain the role of the Command pattern in software design? Q12. How does the Spring Framework support dependency injection? Q13. What is the purpose of the Java Memory Model (JMM)? Q14. Can you explain the key concepts behind an Event-Driven Architecture and its use cases? Q15. What is the role of reactive programming in Java and how is it implemented using Spring Reactor? Q16. What is the role of annotations in Java EE applications? Q17. How is dependency injection implemented in Spring Boot applications? Q18. What are the key differences between SQL and NoSQL databases? Q19. What is the difference between a HashMap and ConcurrentHashMap? Q20. How do you handle versioning in RESTful APIs? Q21. What is the role of Docker Compose in containerized applications? Q22. Can you explain the concept of HATEOS (Hypermedia as the Engine of Application State) in the context of REST APIs? Q23. Can you explain the role and benefits of the CyclicBarrer class in java and provide examples of its typical use cases? Q24. How can you ensure that a Spring Data JPA application is optimized for performance? Q25. What are some best practices for RESTful API design?

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