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Hibernate - Interview Questions and Answers for 'Hibernate annotations' - 4 question(s) found - Order By Newest

 Q1. What is the use of @GeneratedValue annotation in Hibernate?Hibernate
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Ans. This annotation is added to the auto increment column with the strategy to increment the column value. Usually this is added to the surrogate primary key column and specified with the Database Sequence.

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   Like         Discuss         Correct / Improve     hibernate   hibernate annotations   @generatedvalue   database sequence


 Q2. What entries we make in the hibernate config file if we are not using hbm files but Annotations ?Hibernate
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Ans. We configure Entity classes having annotated mappings.

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 Q3. What is the difference between these 2 annotations ?

@Entity

@Entity ( name="EMPLOYEES" )
Hibernate
admin
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Ans. The first annotation will try to map the Class with the Table as of same name as Class whereas the second annotation will specify the Entity name as "EMPLOYEES" and hence will try to map with Table Name "EMPLOYEES".

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 Q4. What is the difference between these 2 annotations ?

@Entity ( name ="EMPLOYEES")
@Entity @Table ( name=""EMPLOYEES"" )

@Entity ( name="EMP")
@Table ( name="EMPLPYEES" )
Hibernate
Admin
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Ans. First Annotation will set the Entity name as EMPLOYEES and hence will try to map with the same Table name.

The second annotation will make the Entity mapped to table EMPLOYEES irrespective of the Entity Name ( which is class name in this case ).

Third Annotations will set the different names for Enitity and Table and will explicitly map them.

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   Like         Discuss         Correct / Improve     hibernate   hibernate annotations   entity annotation   table annotation


 Q5. Which of the following is not an Hibernate AnnotationHibernate
a. @Id
b. @JoinTable
c. @ManyToMany
d. @Autowired

Ans.d. @Autowired


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