- EJB - Home
- EJB - Overview
- EJB - Environment Setup
- EJB - Create Application
- EJB - Stateless Bean
- EJB - Stateful Bean
- EJB - Persistence
- EJB - Message Driven Beans
- EJB - Annotations
- 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 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 - Which of the following bean is represents persistent data storage?
Answer : B
Explaination
Entity bean represents persistent data storage.
Q 3 - Which of the following is correct about description attribute in @javax.ejb.Stateless annotation?
A - It is used to specify name of the session bean.
B - it is used to specify the JNDI name of the session bean.
Answer : C
Explaination
description attribute in @javax.ejb.Stateless annotation is used to provide description of the session bean.
Q 4 - Which of the following annotation is used to specify that a given ejb class is a stateful session bean?
Answer : B
Explaination
@javax.ejb.Stateful annotation specifies that a given ejb class is a stateful session bean.
Q 5 - Which of the following is true about @javax.ejb.Local annotation?
A - @javax.ejb.Local annotation is used to specify Local interface(s) of a session bean.
Answer : D
Explaination
@javax.ejb.Local annotation is used to specify Local interface(s) of a session bean. This local interface states the business methods of the session bean (which can be stateless or stateful). This interface is used to expose the business methods to local clients which are running in same deployment/application as EJB.
Q 6 - Which of the following is true about callbacks in EJB?
A - Callback is a mechanism by which life cycle of an enterprise bean can be intercepted.
B - EJB Container calls callbacks.
C - We can define callback methods in the ejb class itself or in a separate class.
Answer : D
Explaination
Callback is a mechanism by which life cycle of an enterprise bean can be intercepted. EJB 3.0 specification has specified callbacks for which callback handler methods are to be created. EJB Container calls these callbacks. We can define callback methods in the ejb class itself or in a separate class. EJB 3.0 has provided many annotations for callbacks.
Q 7 - Which of the following is correct about Class level interceptor in EJB?
A - Such interceptor is invoked for every method of the bean.
B - Such interceptor is invoked for every bean within deployment.
C - Such interceptor is invoked for a particular method of the bean.
Answer : A
Explaination
Class level interceptor is invoked for every method of the bean.
Q 8 - What ACID stands for?
A - Atomic, Consistent,Isolated and Durable
B - Acurate, Correct,Isolated and Durable
Answer : A
Explaination
ACID stands for Atomic, Consistent,Isolated and Durable.
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 - Which of the following is true about exceptions handling by EJB Container?
Answer : C
Explaination
When Application Exception occurs, ejb container intercepts the exception but returns the same to the client as it is. It does not roll back the transaction unless it is specified in code by EJBContext.setRollBackOnly() method.