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- EJB - Callbacks
- EJB - Timer Service
- EJB - Dependency Injection
- EJB - Interceptors
- EJB - Embeddable Objects
- EJB - Blobs/Clobs
- EJB - Transactions
- EJB - Security
- EJB - JNDI Bindings
- EJB - Entity Relationships
- EJB - Access Database
- EJB - Query Language
- EJB - Exception Handling
- EJB - Web Services
- EJB - Packaging Applications
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 EJB?
A - EJB is an essential part of a J2EE platform.
Answer : D
Explaination
EJB stands for Enterprise Java Beans. EJB is an essential part of a J2EE platform. J2EE platform have component based architecture to provide multi-tiered, distributed and highly transactional features to enterprise level applications. EJB provides an architecture to develop and deploy component based enterprise applications considering robustness, high scalability and high performance.
Q 2 - When a remote session bean is used in EJB?
Answer : B
Explaination
A remote session bean is used in EJB if ejb client is in different 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 properties required for a message driven bean?
Answer : A
Explaination
@javax.ejb.ActivationConfigProperty annotation is used to specify properties required for a message driven bean.
Q 6 - Which of the following is correct about @PreUpdate annotation for a entity bean?
A - Method is invoked before an entity is to be updated in the 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 : A
Explaination
@PreUpdate - method is invoked before an entity is to be updated in 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 a Isolated transaction in EJB?
B - A transaction must keep the system in consistent state.
C - Each transaction executes independent of any other transaction.
D - Transaction should survive system failure if it has been executed or committed.
Answer : C
Explaination
Isolated - Each transaction executes independent of any other transaction.
Q 9 - Which of the following is correct about a Success 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 : B
Explaination
Success - Identify success scenario when a transaction is to be committed.
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.