Free Test JPA (Java Persistence ... – JAVA

Q1: What does JPA stand for?

A. Java Programming API B. Java Persistence API C. Java Platform Application D. Java Package Annotation

Q2: Which annotation marks a class as a JPA entity?

A. @EntityBean B. @Persistence C. @Entity D. @Table

Q3: Which annotation is used to define the primary key in a JPA entity?

A. @Id B. @Primary C. @PK D. @Column(pk=true)

Q4: Which annotation is used to define column mapping in JPA?

A. @Field B. @Column C. @Data D. @Mapper

Q5: Which class is used to manage persistence in JPA?

A. EntityHandler B. EntityManager C. PersistenceManager D. DatabaseManager

Q6: Which method is used to save an entity in JPA?

A. add() B. store() C. save() D. persist()

Q7: Which file defines the persistence unit in JPA?

A. jpa-config.xml B. persistence.xml C. orm.xml D. entity.xml

Q8: What is a persistence unit?

A. A JDBC connection B. A table reference C. A set of entity classes managed together D. A data type

Q9: Which annotation is used to generate values for primary key automatically?

A. @Generate B. @AutoKey C. @GeneratedValue D. @Sequence

Q10: Which method is used to retrieve an entity by its ID?

A. findById() B. load() C. find() D. get()

Q11: Which annotation is used to create a one-to-many relationship?

A. @OneToOne B. @ManyToOne C. @OneToMany D. @ManyToMany

Q12: Which JPA feature caches entities during a transaction?

A. Session context B. Persistence context C. Entity pool D. Connection pool

Q13: What does @Transient annotation do?

A. Makes field constant B. Marks field as final C. Excludes field from persistence D. Enables lazy loading

Q14: Which lifecycle callback is invoked before entity removal?

A. @PostLoad B. @PreRemove C. @PreDestroy D. @BeforeRemove

Q15: What is the purpose of @JoinColumn annotation?

A. Join two databases B. Map foreign key C. Specify index D. Create a primary key

Q16: Which method removes a managed entity from the database?

A. delete() B. remove() C. erase() D. drop()

Q17: Which annotation is used for optimistic locking?

A. @Lock B. @Version C. @Concurrency D. @Optimistic

Q18: Which exception is thrown when an entity is not found?

A. EntityNotFoundException B. PersistenceException C. NoResultException D. MissingEntityException

Q19: Which annotation defines the table name explicitly?

A. @Entity B. @Table C. @Database D. @TableName

Q20: Which annotation is used to define a native SQL query?

A. @SQLQuery B. @Query C. @NamedQuery D. @NamedNativeQuery

Quiz for JPA (Java Persistence API)