310-090 Exam

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


1. Given:
Which two elements must be included in the <resource-ref> tag? (Choose two.)
A. <res-type>
B. <res-ref-name>
C. <resource-env-ref>
D. <environment-resource>
Answer: A B

2. 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

3. 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

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

5. 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