Hibernate Framework HQL and Criteria API 2

Question 1

Which Hibernate API allows building queries programmatically without writing HQL strings?

Accepted Answer

Criteria API

Answer

The Criteria API provides a type-safe, programmatic way to build Hibernate queries without writing query strings.

Question 2

Which class is the entry point for creating a CriteriaQuery in JPA/Hibernate?

Accepted Answer

CriteriaBuilder

Answer

CriteriaBuilder is obtained from the EntityManager and is used to create CriteriaQuery, Predicate, and expression objects.

Question 3

What does the Root<T> object represent in a Criteria query?

Accepted Answer

The entity being queried from — the FROM clause

Answer

Root<T> represents the root entity in the FROM clause of a Criteria query, used to navigate to entity fields.

Question 4

Which method adds a WHERE condition to a CriteriaQuery?

Accepted Answer

criteriaQuery.where(predicate)

Answer

The where() method on CriteriaQuery accepts one or more Predicate objects to define the filtering conditions.

Question 5

What is a Predicate in the JPA Criteria API?

Accepted Answer

A boolean condition used in WHERE clauses

Answer

A Predicate represents a boolean expression that can be used in WHERE, HAVING, or join conditions in a Criteria query.

Hibernate Framework Practice Test