Hibernate Framework Hibernate Configuration 3

Question 1

What is the purpose of the persistence.xml file in JPA/Hibernate?

Accepted Answer

Defines a persistence unit with provider, data source, and entity classes

Answer

persistence.xml defines a JPA persistence unit, specifying the provider (Hibernate), datasource, and entity classes.

Question 2

Which Hibernate property controls the number of SQL statements batched together?

Accepted Answer

hibernate.jdbc.batch_size

Answer

The hibernate.jdbc.batch_size property sets how many statements Hibernate batches before sending them to the database.

Question 3

What is a SessionFactory in Hibernate?

Accepted Answer

A thread-safe factory that creates Session objects

Answer

SessionFactory is a heavyweight, thread-safe object that creates Session instances and should be created once per application.

Question 4

Which method opens a new Hibernate Session from a SessionFactory?

Accepted Answer

openSession()

Answer

The openSession() method on SessionFactory opens a new database session for performing persistence operations.

Question 5

What does hibernate.connection.autocommit=true do?

Accepted Answer

Makes each JDBC connection auto-commit transactions

Answer

Setting autocommit=true causes each SQL statement to be automatically committed without an explicit transaction.

Hibernate Framework Practice Test