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EJB Online Quiz
Following quiz provides Multiple Choice Questions (MCQs) related to EJB Framework. You will have to read all the given answers and click over the correct answer. If you are not sure about the answer then you can check the answer using Show Answer button. You can use Next Quiz button to check new set of questions in the quiz.
Q 1 - Which of the following is true about entity bean?
A - User data can be saved to database via entity beans.
B - User data can be retrived from the database in the entity bean.
Answer : D
Explaination
Entity beans represents persistent data storage. User data can be saved to database via entity beans and later on can be retrived from the database in the entity bean.
Q 2 - When a local session bean is used in EJB?
Answer : A
Explaination
A local session bean is used in EJB if ejb client is in same environment where ejb session bean is to be deployed.
Q 3 - Which of the following is correct about messageListenerInterface attribute in @javax.ejb.MessageDrivenBean annotation?
A - It is used to specify name of the message driven bean.
B - it is used to specify message listener interface for the message driven bean.
D - It is used to specify the JNDI name of the message driven bean.
Answer : B
Explaination
messageListenerInterface attribute in @javax.ejb.MessageDrivenBean annotation is used to specify message listener interface for the message driven bean.
Q 4 - Which of the following is correct about name attribute in @javax.ejb.EJB annotation?
A - It is used to specify name which will be used to locate the referenced bean in environment.
B - it is used to specify the interface type of the referenced bean.
C - It is used to provide name of the referenced bean.
D - It is used to specify the JNDI name of the referenced bean.
Answer : A
Explaination
name attribute in @javax.ejb.EJB annotation is used to specify name which will be used to locate the referenced bean in environment.
Q 5 - Which of the following annotation is used to specify Local interface(s) of a session bean?
Answer : C
Explaination
@javax.ejb.Local annotation is used to specify Local interface(s) of a session bean.
Q 6 - Which of the following is correct about @PreRemove annotation for a entity bean?
A - Method is invoked when an entity is created in database.
B - Method is invoked after an entity is created in database.
C - Method is invoked when an entity is deleted from the database.
D - Method is invoked after an entity is deleted from the database.
Answer : C
Explaination
@PreRemove - method is invoked when an entity is deleted from the database.
Q 7 - Which annotation is used to inject an datasource into an ejb?
Answer : B
Explaination
@Resource annotation is used to inject an datasource into an ejb.
Q 8 - Which of the following is correct about @Embeddable annotation for a entity bean?
A - A java POJO to be embedded must be annotated as @Embeddable.
B - An entity bean to be embedded must be annotated as @Embeddable.
Answer : A
Explaination
A java POJO to be embedded must be annotated as @Embeddable.
Q 9 - Which of the following is correct about a Start attrribute of Bean Managed Transactions in EJB?
A - When to start a transaction in a business method.
B - Identify success scenario when a transaction is to be committed.
C - Identify failure scenario when a transaction is to be rollback.
Answer : A
Explaination
Start - When to start a transaction in a business method.
Q 10 - What JNDI stands for?
A - Java Naming and Directory Interface
B - Joint Naming and Directory Interface
Answer : A
Explaination
JNDI stands for Java Naming and Directory Interface.
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