Interview Questions to Ace Your Java Persistence API Interview

Describe in detail the Persistence Unit in JPA.

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What is the purpose of the @Version annotation in JPA? How is it used in optimistic locking? Explain the concept in detail.

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Difference between JPA and CRUD Repository? Explain with an example.

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Explain how JPA handles entity state transitions. What are some best practices for managing entity states in JPA?

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How can you use JPA to perform pagination of query results? Explain pros of using pagination over fetching all results at once?

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What types of identifier generation does JPA support?

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What is the purpose of @OneToOne & @OneToMany annotations in JPA? Explain in detail with examples.

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How can JPA handle optimistic concurrency control? Explain how EntityManager.lock() method works?

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What is the purpose of the @Transactional annotation in JPA?

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What is the difference between CascadeType.ALL and CascadeType.PERSIST in JPA?

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Ready to take the next step in your tech career?

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