Deck 6: JSP, EJB, and JMS

Question 1

Which of the following is not an implicit object in JSP?
I. Request.
II. Session.
III. Vector.
IV. In.

A) Both (I) and (II) above
B) Both (II) and (III) above
C) Both (I) and (III) above
D) Both (III) and (IV) above.

Answer 1

Both (III) and (IV) above.

Question 2

Which is not a valid scope for Java bean in JSP?

A) Page
B) Session
C) Request
D) Global.

Answer 2

Global.

Question 3

Which two of the following is responsible to creates ejb-jar files?
1) The bean provider.
2) The application assembler.
3) The deployer.
4) The system administrator.

A) 1 and 2
B) 2 and 3
C) 3 and 4
D) 4 and 1

Answer 3

1 and 2

Question 4

Which two of the following must be included in every ejb-jar file?
1) Stubs for the EJBHome and EJBObject interface.
2) The JAR Manifest file.
3) A deployment descriptor.
4) The JNDI context.
5) The EJB's home interface.

A) 1 and 3
B) 2 and 5
C) 3 and 5
D) 4 and 2

Question 5

Which statement about session beans is true?

A) In both stateless and statefull session classes, the bean provider must write the method public void remove()
B) The method << remove >> in the component interface can be accessed only by the remote clients
C) The bean's handle must be provided by the client, in order to ask the EJBHome for removing a session bean
D) None of the above

Question 6

Which of the following can be directly invoked by the client?

A) ejbPassivate
B) business methods
C) setSessionContext
D) newInstance

Question 7

Which is the method available in SessionContext interface?

A) afterBegin()
B) getRollbackOnly()
C) setSessionCotext()
D) getUserTransaction()

Question 8

Which statements about a session bean class are true?

A) It is a final class
B) Overloaded constructors are supported
C) Their business methods can be 'private'
D) The ejbCreate() method must not be a final method

Question 9

Upon invoking getRollbackOnly() method by a business method in an entity bean, which transaction attribute settings will lead the ejb container to throw an exception?

A) Required
B) RequiresNew
C) Never
D) Mandatory

Question 10

When a session bean has container-managed demarcation value of 'Supports', which three methods run in an unspecified transaction context?
1) ejbActivate
2) getRollbackOnly
3) getUserTransaction
4) ejbRemove
5) afterBegin
6) afterCompletion

A) 1,4,3
B) 4,2,6
C) 1,4,6
D) 2,5,6

Question 11

EJB system's performance tuning is the responsibility of

A) Bean Provider
B) EJB Deployer
C) Application Assembler
D) Tool Vendor

Question 12

The EJB Transaction Attribute that ensures the method call that always takes place in a transaction, either client started or container started' are

A) TX_SUPPORTS
B) TX_MANDATORY
C) TX_REQUIRED and TX_REQUIRES_NEW
D) Either A or B

Question 13

JMS is mainly used to send and receive message from one application to another.

A) True
B) False
C) none
D) all

Question 14

Abbreviate the term JMS?

A) Java Message Service
B) Java Monitor Service
C) Java Message Session
D) Java Monitor Session

Question 15

A message driven bean is like statefull session bean that encapsulates the business logic and doesn't maintain state.

A) True
B) False
C) none
D) all

Question 16

EJB QL is a Query Language provided for navigation across a network of enterprise beans and dependent objects defined by means of container managed persistence.

A) True
B) False
C) none
D) all

Question 17

Which case of a session bean obtains the UserTransaction object via the EJBContext using the getUserTransaction() method in EJB transaction management?

A) Bean-managed transactions
B) Container-managed transactions
C) Both A & B
D) None of the above

Question 18

Which services are provided to EJB components by the EJB container?

A) Transaction support
B) Persistence support
C) Naming support
D) All mentioned above

Question 19

Which EJB container must provide an implementation of Java Naming and Directory Interface (JNDI) API to provide naming services for EJB clients and components?

A) Transaction support
B) Persistence support
C) Naming support
D) All mentioned above

Question 20

Which session bean maintain their state between client invocations but are not required to maintain their state across server crashes or shutdowns?

A) Stateful Session Bean
B) Stateless Session Bean
C) Singleton Session Bean
D) None of the above

Question 21

EJB is a specification for J2EE server, not a product; Java beans may be a graphical component in IDE.

A) True
B) False
C) none
D) all

Question 22

A session bean represents a multiple clients inside the Application Server.

A) True
B) False
C) none
D) all

Question 23

Which statement characterizes stateless session beans?

A) They allow the PostConstruct, PreDestroy, and PrePassivate life-cycle callbacks.
B) They require home interfaces.
C) When a client looks up a stateful session bean in the JNDI, the same bean is returned every time.
D) They are asynchronous message consumers.

Question 24

A message-driven bean can have an instance of a MessageDrivenContext injected. Which method can be successfully invoked on this interface from a message-driven bean?

A) getEJBHome
B) getCallerPrincipal ()
C) isCallerInRole
D) getEJBLocalHome

Question 25

Which statement about entities is correct?

A) Entities must be annotated with the @Entity annotation.
B) Entities can be final classes.
C) Entities can have a single no-arg constructor with protected visibility.
D) Instance variables of an entity can have private, protected, public, or package visibility.