Spring Data JPA

Practice 25 Spring Data JPA interview questions with detailed answers. Part of the Spring Data Jpa track on Java Interview Hub.

• What is Spring Data JPA?
• Explain features of Spring Data JPA?
• How to create a custom Repository class in Spring JPA?
• Difference between CRUDRepository and JPARepository.
• Write a custom query in Spring JPA?
• What is the purpose of save() method in CrudRepository?
• What is the use of @Modifying annotation?
• Difference between findById() and getOne().
• Use of @Temporal annotation.
• Write a query method for sorting in Spring Data JPA.
• Explain @Transactional annotation in Spring.
• What is the difference between FetchType.Eager and FetchType.Lazy?
• Use of @Id annotation.
• How will you create a composite primary key in Spring JPA.
• What is the use of @EnableJpaRepositories method?
• What are the rules to follow to declare custom methods in Repository.
• Explain QueryByExample in spring data jpa.
• What is pagination and how to implement pagination in spring data?
• Explain few CrudRepository methods.
• Difference between delete() and deleteInBatch() methods.
• You need to execute a complex query that involves multiple tables and conditional logic. How do you implement this in Spring JPA?
• Your application requires the insertion of thousands of records into the database at once. How do you optimize this batch process using Spring JPA?
• You have entities with bidirectional relationships. How do you ensure these are correctly managed in Spring JPA to avoid common issues like infinite recursion?
• How do you handle schema migration in a project using Spring JPA when the schema changes due to business requirements?
• You are experiencing performance issues with certain frequently accessed data. How can you implement caching in Spring JPA to improve performance?