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Exam : SUN 310-090
Title : Sun Certified Business Component Developer for J2EE 1.3


1. Which two statements about a client's reference to a session bean's remote home interface are true? (Choose two.)
A. The reference can be passed as a method argument.
B. The reference provides the client with the IP address of the bean instance.
C. The reference provides the client with access to at least one create method.
D. A new home reference must be obtained for each new reference to a remote component interface.
Answer: A C

2. Label the methods according to whether the container ensures that the identity of the associated entity object is available or unavailable to the instance during the method.
Answer:

3. Which two are valid types for persistent fields in a CMP 2.0 entity bean? (Choose two.)
A. Java primitives
B. entity bean local interfaces
C. classes implementing java.io.Serializable
D. either java.util.Collection or java.util.Set
Answer: A C

4. Which transaction attribute may cause a javax.transaction.TransactionRequiredException to be thrown?
A. Required
B. Supports
C. Mandatory
D. RequiresNew
Answer: C

5. Which two are required to properly implement a CMP entity bean class? (Choose two.)
A. Declare variables for all persistent fields.
B. Provide constructors to initialize the CMP fields.
C. Do not implement the ejbFind methods.
D. Provide implementation code for get and set methods to store and retrieve the persistent fields.
E. Implement ejbCreate methods for all home interface create methods.
Answer: C E

6. Which exception can be thrown by the findByPrimaryKey method of a remotely called entity bean using container-managed persistence?
A. javax.ejb.EJBException
B. javax.ejb.DuplicateKeyException
C. javax.ejb.NoSuchEntityException
D. javax.ejb.ObjectNotFoundException
Answer: D

7. Which is a Bean Provider's security-related responsibility?
A. assigns principals to roles in the application server
B. declares the role-link element in the deployment descriptor
C. declares the security-role element in the deployment descriptor
D. declares the security-role-ref element in the deployment descriptor
Answer: D

8. Click the Exhibit button.
All beans involved use container-managed transactions and all methods are marked as Required. At runtime, methodB is unable to communicate with its resource and calls the setRollbackOnly method. What is the result?
A. JMS message redelivery semantics will apply.
B. The rollback will propagate to the sender of the message.
C. The bean's onMessage method will reattempt the sequence.
D. Transactions started by the onMessage method will always commit.
Answer: A

9. Which statement is true about a session bean's lifecycle?
A. Session beans cannot receive re-entrant loopback calls.
B. A stateless session bean's home interface can have overloaded create methods.
C. Stateless session beans can implement javax.ejb.SessionSynchronization.
D. The EJB 2.0 container can make concurrent calls to any stateful session bean instance.
Answer: A

10. Given:
Which two elements must be included in the tag? (Choose two.)
A.
B.
C.
D.
Answer: A B

11. Which method can be found in BOTH the EJBHome and EJBLocalHome interface?
A. getHomeHandle()
B. getEJBMetaData()
C. remove(Handle handle)
D. remove(Object primaryKey)
Answer: D

12. Which method from javax.ejb.EJBContext returns an object that allows a Bean Provider to demarcate transactions?
A. begin()
B. getAutoCommit()
C. getTransaction()
D. beginTransaction()
E. getUserTransaction()
Answer: E

13. Which two must be in an ejb-jar file, either by inclusion or reference? (Choose two.)
A. an enterprise archive (.ear) file
B. a deployment descriptor in the format defined by the EJB 2.0 specification
C. the class files for the classes that implement the home and remote interfaces
D. the class files for the interfaces and superinterfaces used by the bean, except J2SE or J2EE interfaces
E. the class files for the stub classes of the EJBHome andEJBObject interfaces, if remote interfaces are deployed for the bean
Answer: B D

14. Which statement about EJB QL is true?
A. An EJB QL query must contain the ORDER BY clause.
B. An EJB QL query is statically defined in the ejb-jar.xml deployment descriptor.
C. Duplicate values are always removed from EJB QL query results by the container.
D. It is legal to use an input parameter in the FROM clause or the SELECT clause of an EJB QL query.
Answer: B