Spring Framework Spring Data & JPA 2

Question 1

What Spring Data JPA feature automatically generates a query based on a repository method's name, such as findByLastNameAndAge?

Accepted Answer

Derived query methods

Answer

Spring Data JPA's derived query methods parse method names to automatically generate JPQL queries based on keywords like findBy, And, Or, and property names.

Question 2

Which JPA annotation establishes a one-to-many relationship on the owning entity side?

Accepted Answer

@OneToMany

Answer

@OneToMany defines the relationship where one entity instance is associated with multiple instances of another entity.

Question 3

What additional capabilities does JpaRepository provide beyond those in PagingAndSortingRepository?

Accepted Answer

JPA-specific operations like flush(), saveAllAndFlush(), and deleteAllInBatch()

Answer

JpaRepository extends PagingAndSortingRepository and adds JPA-specific methods such as flush(), saveAllAndFlush(), deleteAllInBatch(), and getReferenceById().

Question 4

What is the default FetchType for a @ManyToOne relationship in JPA?

Accepted Answer

EAGER

Answer

@ManyToOne defaults to FetchType.EAGER, meaning the related entity is loaded immediately when the owning entity is fetched.

Question 5

What is the primary purpose of Spring Data JPA Specifications?

Accepted Answer

To build dynamic, composable query predicates using the JPA Criteria API

Answer

Specifications implement the Specification<T> interface to create reusable, composable query predicates built on the JPA Criteria API.

Spring Framework Practice Test

Spring Framework Practice Test

Spring Framework Spring Data & JPA 2