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

Stores SQL migration scripts

Answer

Configures HTTP endpoints

Answer

Lists all Java packages to scan

Question 2

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

Accepted Answer

hibernate.jdbc.batch_size

Answer

hibernate.batch.count

Answer

hibernate.sql.batch

Answer

hibernate.jdbc.batch_count

Question 3

What is a SessionFactory in Hibernate?

Accepted Answer

A thread-safe factory that creates Session objects

Answer

A per-request database connection

Answer

A utility class for running HQL

Answer

An interface for transaction management

Question 4

Which method opens a new Hibernate Session from a SessionFactory?

Accepted Answer

openSession()

Answer

createSession()

Answer

getSession()

Answer

newSession()

Question 5

What does hibernate.connection.autocommit=true do?

Accepted Answer

Makes each JDBC connection auto-commit transactions

Answer

Enables automatic schema creation

Answer

Turns on connection pooling

Answer

Commits only on session close

Question 6

Which Hibernate property maps Java types to SQL types for a specific vendor?

Accepted Answer

hibernate.dialect

Answer

hibernate.type.mapping

Answer

hibernate.sql.types

Answer

hibernate.vendor.types