000-484 Exam

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Exam : IBM 000-484
Title : Enterprise connectivity with j2ee v1.3


1. An EJB that is deployed with container-manager transaction contains a business method. This method performs an operation that potentially throws a NullPointerException. If this occurs, the bean cannot recover and should rollback its transaction. What is the BEST way to implement this scenario?
A. Catch the NullPointerException exception, then throw an application exception. The container will rollback the transaction automatically.
B. Catch the NullPointerException exception, then throw an application exception that wraps the original exception. The container will rollback the transaction automatically.
C. Catch the NullPointerException exception, call setRollbackOnly(), thus forcing a rollback of the transaction, then throw an application exception.
D. Do nothing and let the NullPointerException propagate to the container. The container will rollback the transaction automatically.
Answer: C

2. Which of the following represents the order in which a stateful session bean's methods might get executed, according to its life cycle?
A. ejbPassivate(), setSessionContext(), ejbActivate(), ejbRemove().
B. ejbActivate(), setSessionContext(), ejbPassivate(), ejbRemove().
C. setSessionContext(), ejbActivate(), ejbPassivate(), ejbRemove().
D. setSessionContext(), ejbPassivate(), ejbActivate(), ejbRemove().
Answer: D

3. A developer successfully creates and tests a stateful Session Bean. Following deployment, intermittent NullPointerExceptions begin to occur, particularly when the server is heavily loaded. Which bean method is MOST likely to be related to the problem?
A. setSessionContext
B. ejbCreate
C. ejbPassivate
D. beforeCompletion
E. ejbLoad
Answer: C

4. Which of the following are TRUE regarding ejbPostCreate() methods?
A. Only entity beans have ejbPostCreate() methods.
B. ejbPostCreate() method signatures must match ejbCreate() method signatures.
C. ejbPostCreate() methods are optional.
D. Corresponding postCreate() methods exist in the bean's home interface.
E. ejbPostCreate() is called by the EJB container following creation of the bean's EJBObject.
Answer: ABE

5. A developer implements a BMP entity bean which uses a relational database. Identify the lifecycle methods that involve database access.
A. ejbCreate()
B. ejbPostCreate()
C. ejbActivate()
D. ejbPassivate()
E. ejbRemove()
Answer: AE

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