Which of the following is true about the deleteById method of a JpaRepository?
- It deletes an entity by its primary key.
- It marks the entity as deleted but does not remove it from the database.
- It deletes all entities in the repository.
- It deletes an entity based on a custom query.
The deleteById method of a JpaRepository deletes an entity from the database by its primary key. It is a convenient method for removing specific entities based on their unique identifier. The other options do not accurately describe the behavior of this method; in particular, it does not mark the entity as deleted without removing it from the database.
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