Hibernate Framework HQL and Criteria API

Question 1

What does HQL stand for in Hibernate?

Accepted Answer

Hibernate Query Language

Answer

HQL stands for Hibernate Query Language, an object-oriented query language similar to SQL but operating on entity classes.

Question 2

How does HQL differ from SQL?

Accepted Answer

HQL operates on entity class names, SQL operates on table names

Answer

HQL uses Java entity class and field names instead of database table and column names, making queries object-oriented.

Question 3

Which method executes an HQL SELECT query that returns a list of results?

Accepted Answer

query.list()

Answer

The list() method on a Hibernate Query object executes the HQL query and returns all matching results as a java.util.List.

Question 4

How do you set a named parameter in an HQL query?

Accepted Answer

query.setParameter("name", value)

Answer

The setParameter() method binds a value to a named parameter (prefixed with : in HQL) in the query.

Question 5

Which HQL clause is used to filter results, equivalent to SQL WHERE?

Accepted Answer

WHERE

Answer

HQL uses the WHERE clause just like SQL to filter query results based on specified conditions.

Hibernate Framework Practice Test