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Sun Certified Bus. Component Developer Java EE
Updated: 2008-10-7
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16. A developer wants to create a Java Persistence query that returns valid U.S. phone numbers (formatted as ?23-456-7890″ or ?00-RUN-EJB3″) from a collection of differently formatted international phone numbers. The developer needs only those numbers that begin with 303. Which WHERE clause is correct?
A. WHERE addr.phone LIKE ?03_?br /> B. WHERE addr.phone LIKE ?03%?br /> C. WHERE addr.phone LIKE ?03-_-_?br /> D. WHERE addr.phone LIKE ?03-%-%?br /> E. WHERE addr.phone LIKE ?03-___-____?br /> F. WHERE addr.phone LIKE ?03-%%%-%%%%?br /> Answer: E

17. A developer is working on a project that includes both EJB 2.1 and EJB 3.0 session beans. A lot of business
logic has been implemented and tested in these EJB 2.1 session beans. Some EJB 3.0 session beans need to
access this business logic.
Which design approach can achieve this requirement?
A. Add adapted home interfaces to EJB 3.0 session beans to make EJB 3.0 and EJB 2.1 session beans
interoperable.
B. Add EJB 3.0 business interfaces to existing EJB 2.1 session beans and inject references to these business
interfaces into EJB 3.0 session beans.
C. No need to modify existing EJB 2.1 session beans. Use the @EJB annotation to inject a reference to the EJB
2.1 home interface into the EJB 3.0 bean class.
D. No need to modify existing EJB 2.1 session beans. Use the @EJB annotation to inject a reference to the EJB
2.1 component interface into the EJB 3.0 bean class.
Answer: C

18. A developer is modifying an existing Java EE application that uses the JDBC API to access a database. This
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code must be used but cannot be changed, and new code needs to be added that uses the Java Persistence API.
Both parts of the code will execute in the same JTA transaction.
Which method of the EntityManager interface should the new code use to ensure that the data read by JDBC statements includes the state of managed entities?
A. Call refresh on each changed entity.
B. Call flush at the end of each business method.
C. Call find before accessing any managed entity.
D. Call lock at the beginning of each business method.
Answer: B

19. A developer wants to achieve the following two behaviors for an EJB 3.0 session bean:
(1) If the client calls a business method with a transaction context, the container will invoke the enterprise bean�s
method in the client�s transaction context.
(2) If the client calls a business method without a transaction context, the container will throw the javax.ejb.EJBTransactionRequiredException.
Which transaction attribute should be used?
A. REQUIRED
B. SUPPORTS
C. MANDATORY
D. REQUIRES_NEW
E. NOT_SUPPORTED
Answer: C

20. Given a stateless session bean with container-managed transaction demarcation, from which two methods can
a developer access another enterprise bean? (Choose two.)
A. bean constructor
B. Timeout callback method
C. PreDestroy lifecycle callback method
D. PostConstruct lifecycle callback method
E. business method from the business interface
Answer: BE