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Hibernate / Hibernate interview questions

What are the different states of object in hibernate?

There are 3 states of object (instance) in hibernate.

  • Transient: The object is in transient state if it is just created but has no primary key (identifier) and not associated with session.
  • Persistent: The object is in persistent state if session is open, and you just saved the instance in the database or retrieved the instance from the database.
  • Detached: The object is in detached state if session is closed. After detached state, object comes to persistent state if you call lock() or update() method.

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