Hibernate Framework Hibernate Mapping 3

Question 1

What does the @Table annotation do in Hibernate?

Accepted Answer

Specifies the database table name for an entity

Answer

Creates a new database table

Answer

Maps a collection to a table

Answer

Defines an index on a table

Question 2

Which inheritance strategy stores all classes in a single table?

Accepted Answer

SINGLE_TABLE

Answer

TABLE_PER_CLASS

Answer

JOINED

Answer

MAPPED_SUPERCLASS

Question 3

What is the purpose of a discriminator column in Hibernate inheritance?

Accepted Answer

It identifies which subclass a row belongs to in SINGLE_TABLE strategy

Answer

It stores primary keys

Answer

It holds foreign key references

Answer

It tracks row version numbers

Question 4

Which annotation specifies the discriminator column in Hibernate?

Accepted Answer

@DiscriminatorColumn

Answer

@TypeColumn

Answer

@InheritanceColumn

Answer

@ClassColumn

Question 5

What does @Version do in a Hibernate entity?

Accepted Answer

Enables optimistic locking by tracking a version number

Answer

Stores the Hibernate version used

Answer

Records the last modified timestamp

Answer

Counts the number of updates

Question 6

Which mapping type would you use for a List with index persistence in Hibernate?

Accepted Answer

@OrderColumn

Answer

@IndexedList

Answer

@ListMapping

Answer

@ElementIndex