An application wants to utilize side-effects of cascading entity-manager operations to related entities. Which statement is correct?

A. The persist operation is always cascaded to related entities for one-to-one and one-to- many relationships

B. To minimize the effect of the remove operation applied to an entity participating in a many- tomany relationship the remove operation should be cascaded to entities on both sides of the relationship.

C. The persist operation applied to a new entity X is cascaded to entities referenced by X if the relationship from Xto these other entities is annotated with the cascade=PERSIST or cascade=ALL annotation element value.

D. The remove operation applied to a removed entity X is cascaded to entities referenced by X if the relationship from Xto these other entities is annotated with the cascade=REMOVE or cascade=ALL annotation element value.

A developer is working on a user registration application using EJB 3.0. A business method registerUser in stateless session bean RegistrationBean performs the user registration. The registerUser method executes in a transaction context started by the client. If some invalid user data causes the registration to fail, the client invokes registerUser again with corrected data using the same transaction. Which design can meet this requirement?

A. Have registerUser method call EJBContext.setRollbackOnlyOmethodafter registration fails.

B. Have registerUser method throw javax.ejb.EJBTransactionRequiredExceptionafterregistration fails.

C. HaveregisterUser method throw EJBException without marking the transaction for rollback, after registration fails.

D. Create an application exception withtherollbackattributeset to falseandhave registerUser method throwit afterregistration fails.

A Java EE 5 Application server has four different security realms for user management. One of the security realms is custom made. This realm supports only individual user entries, no grouping of users, and is used by the application. Which two statements are true? (Choose two.)

A. EJB developers cannot use the isCallerlnRole method.

B. The annotation @RunAs("AAA")can still be used for this application.

C. Allsecurity roles needarole-linkentryinthedeployment descriptor.

D. All security roles can be mapped successfully to individual users in the realm.

Which statement about mapping using the Java Persistence API is correct?

A. User-defined XML mapping files can be used only if orm. xml file is NOT present.

B. All mapping files other than orm. xml must be listed explicitly in the persistence, xml descriptor.

C. Mapping information specified in the XML mapping file overrides all annotations and default mappings.

D. The orm.xml file must be placed into the persistence unit's root to be processed by the persistence provider.

Given an EJB 3.0 J MS message-driven bean, which statement is true about its exception handling?

A. Its message listener method must NOT throw any checked exception.

B. Its message listener method can throw java. rmi. RemoteException.

C. Its message listener method can throw any checked exception except java. rmi. RemoteException.

D. Its message listener method can throw any checked exception that implements java. io.Serializable.