Oracle Oracle Certifications 1Z0-860 Questions & Answers

• Question 131:

  A session bean's business method throws an exception during execution. Which two are responsibilities of the Bean Provider when throwing the exception? (Choose two.)

  A. For application exceptions, ensure that if the current transaction commits there will be no loss of data integrity.

  B. For application exceptions, ensurethatthe current transaction will commit.

  C. For system errors, when the client is remote, throw a java.rmi.RemoteException that wraps the original exception.

  D. For checked exceptions from which the bean cannot recover, throw an EJBException that wraps the original exception.

  Correct Answer: AD

• Question 132:

  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.

  Correct Answer: BD

• Question 133:

  A developer wants to write a stateful session bean using the following interface as local business interface:

  1.

  package acme;

  2.

  public interface Bar{

  3.

  public void barQ;4-i

  Assuming there is NOT an ejb-jar.xml file, which code can be inserted into Lines 4-6 below to define the bean with the ejb name of BarBean?

  1.

  package acme;

  2.

  import javax. ejb.*;

  3.

  import Java, io.*; 4.

  5.

  6.

  7.}

  A. ©Stateful public class BarEJB implementsBar{ public void bar0 {}

  B. @Stateful(name="Bar") public class BarBean implements Bar{ public void barQ {}

  C. ©Stateful public classBarBeanimplements Serializable, Bar{ public void bar0{}

  D. @Stateful(name="Bar") public class BarBean implementsBar{ public void barQ throwsJava.rmi.RemoteException{}

  Correct Answer: C

• Question 134:

  Using bean-managed transaction demarcation, under which two circumstances must the container roll back a transaction? (Choose two.)

  A. A stateful session bean invokes UserTransaction.getRollbackOnly.

  B. A stateful session bean throws an uncaught application exception from a business method.

  C. A stateful session bean begins a transaction in a business method but does NOT complete it before returning.

  D. A stateless session bean begins a transaction in a business method but does NOT complete it before returning.

  E. A message-driven bean begins a transaction in a message listener method but does NOT complete it before returning.

  Correct Answer: DE

• Question 135:

  Which statement is true about the Timer service in an EJB 3.0 stateless session bean?

  A. The timeout callback method contains the business logic that handles the timeout event.

  B. The timeout callback method must be declared as a business method in business interfaces.

  C. The timeout callback method can throw application exceptions to report business logic failures.

  D. A bean class can implement multiple timeout callback methods, each associated with a different timer.

  Correct Answer: A

• Question 136:

  The Java Persistence API defines the Query interface. Which two statements about the Query.executeUpdate method are true? (Choose two.)

  A. Itmust always be executed within a transaction.

  B. It throws a PersistenceException if no entities were updated.

  C. It throws an HlegalStateException if called on a Query instance created with a Java Persistence SELECT query.

  D. All managed entity objects corresponding to database rows affected by the update will have their state changed to correspond with the update.

  Correct Answer: AC

• Question 137:

  FooBean and BarBean are both EJB 3.0 stateless session beans with container-managed transaction demarcation. All business methods in FooBean have transaction attribute REQUIRED, and all business methods in BarBean have

  transaction attribute REQUIRES_NEW. The business method foo in FooBean invokes the business method bar in BarBean.

  Given:

  10.

  public class BarBean {

  11.

  public void bar0{

  12.

  throw new RuntimeException("unexpected error..."); 13.}

  Which is true about the result of this method invocation assuming execution reaches Line 12?

  A. FooBean.foo method receives javax.ejb.EJBException.

  B. TheBarBean bean instance is in ready state for the next invocation.

  C. FooBean.foo methodreceivesjavax.ejb.EJBTransactionRolledbackException.

  D. FooBean.foo method receivestheoriginal RuntimeException thrown fromBarBean.bar method.

  Correct Answer: A

• Question 138:

  A stateful session bean contains a number of instance variables. The types of instance variables A and B are NOT serializable. Instance variable B is a complex type which is populated by many business calls, and can, therefore, NOT be refilled by the client without starting all over. A helper instance variable C is defined as having a Serializable type, and can hold all the information which is in variable B. For example, B is of type XML-DOM Tree and C of type String. Which two solutions, when combined, maintain the state of the session bean over a passivation and activation by the container? (Choose two.)

  A. The value of helper variable C is used to create the value ofinstancevariableBin the beans noarg constructor.

  B. Thevalueofhelper variable C is usedtocreate the value ofinstancevariableBin a @PostCreate annotated method.

  C. The value ofhelpervariable C isusedto create the value of instance variableBin a@PostActivate annotated method.

  D. Instancevariable A must be made null and instance variable B mustbeconverted toaSerializable type and assigned to anotherinstancevariable in a @PreDestroy annotated method.

  E. Instance variableAmustbedefinedtransient.Instance variableBmustbe convertedtoaSerializable type,set to null,and assigned totheinstancevariableC ina@PrePassivate annotatedmethod.

  Correct Answer: CE

• Question 139:

  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.

  Correct Answer: C

• Question 140:

  You have been asked to develop business methods for an enterprise bean to fulfill the following objective:

  If the JDBC connection is NOT available, the current state of the shopping cart session must be serialized. A serialized state must be written to a text file using a java.io.PrintWriter. Data must be shared with a Web services end point. Logging

  information must be displayed in ajavax.swing.JPanel component. Which is true?

  A. The requirements can be fullfilled only in sessionbeans.

  B. Therequirementscan befulfilled only in message-driven beans.

  C. Allof the requirements can be fulfilled using either session beans or message-driven beans.

  D. None of the requirements can be fulfilled using either session beans or message-driven beans.

  E. Bothsession beansandmessage-driven beans canfulfillsomebutnotalloftherequirements.

  Correct Answer: E