JavaBeans Interview Questions

JavaBeans interview questions

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Total Questions: 15

1. What does the EJB specification architecture define ?

A. Transactional components

B. Distributed object components

C. Server-side components

D. All of the above

Correct Answer is : All of the above

2. What executes EJB components ?

A. A web server

B. An application server

C. An EJB container

D. A database server

Correct Answer is : An EJB container

3. What do enterprise beans use to communicate with the EJB container to get runtime context information ?

A. The javax.ejb.EJBContext provided by the container

B. A JNDI ENC context

C. A javax.ejb.EJBHome object provided by the container

D. A javax.ejb.EJBMetaData object provided by the container

Correct Answer is : The javax.ejb.EJBContext provided by the container

4. Through what interface does an application create, find, and remove enterprise beans ?

A. java.rmi.Remote

B. javax.ejb.EJBHome

C. javax.ejb.EJBObject

D. javax.ejb.EntityBean

Correct Answer is : javax.ejb.EJBHome

5. What type of enterprise bean is used to embody business objects ?

A. javax.ejb.EnterpriseBean

B. java.rmi.Remote

C. javax.ejb.SessionBean

D. javax.ejb.EntityBean

Correct Answer is : javax.ejb.EntityBean

6. Which of the following is not an Enterprise Beans type?

A. Doubleton

B. Singleton

C. Stateful

D. Stateless

Correct Answer is : Doubleton

7. Which of the following is not true about Java beans?

A. Implements java.io.Serializable interface

B. Extends java.io.Serializable class

C. Provides no argument constructor

D. Provides setter and getter methods for its properties

Correct Answer is : Extends java.io.Serializable class

8. Which file separator should be used by MANIFEST file?

A. /

B. \

C. –

D. //

Correct Answer is : /

9. Which of the following is correct error when loading JAR file with duplicate name?

A. java.io.NullPointerException

B. java.lang.ClassNotFound

C. java.lang.ClassFormatError

D. java.lang.DuplicateClassError

Correct Answer is : java.lang.ClassFormatError

10. Java Beans are extremely secured?

A. TRUE

B. FALSE

Correct Answer is : FALSE

11. Which of the following is not a feature of Beans?

A. Introspection

B. Events

C. Persistence

D. Serialization

Correct Answer is : Serialization

12. What is the attribute of java bean to specify scope of bean to have single instance per Spring IOC?

A. prototype

B. singleton

C. request

D. session

Correct Answer is : singleton

13. Which attribute is used to specify initialization method?

A. init

B. init-method

C. initialization

D. initialization-method

Correct Answer is : init-method

14. Which attribute is used to specify destroy method?

A. destroy

B. destroy-method

C. destruction

D. destruction-method

Correct Answer is : destroy-method

15. How to specify autowiring by name?

A. @Qualifier

B. @Type

C. @Constructor

D. @Name

Correct Answer is : @Qualifier

JavaBeans interview questions