Hibernate Framework Hibernate Mapping

Question 1

Which annotation maps a Java class field to a specific database column?

Accepted Answer

@Column

Answer

@Field

Answer

@Attribute

Answer

@DbColumn

Question 2

What does the @Id annotation signify in a Hibernate entity?

Accepted Answer

It marks the field as the primary key

Answer

It marks the field as indexed

Answer

It marks the field as unique

Answer

It marks the field as nullable

Question 3

Which @GeneratedValue strategy uses a database sequence?

Accepted Answer

GenerationType.SEQUENCE

Answer

GenerationType.AUTO

Answer

GenerationType.IDENTITY

Answer

GenerationType.TABLE

Question 4

What is the difference between @OneToOne and @ManyToOne?

Accepted Answer

@OneToOne maps a unique relationship while @ManyToOne maps multiple entities to one

Answer

@OneToOne is for primitives, @ManyToOne for objects

Answer

They are identical

Answer

@ManyToOne creates a join table

Question 5

Which annotation marks a collection as a one-to-many relationship?

Accepted Answer

@OneToMany

Answer

@CollectionOf

Answer

@HasMany

Answer

@ForeignKey

Question 6

What does the mappedBy attribute in @OneToMany indicate?

Accepted Answer

The field on the owning side that holds the foreign key

Answer

The table name for the relationship

Answer

The cascade type to apply

Answer

The fetch strategy to use