Oracle Oracle Certifications 1Z0-860 Questions & Answers

• Question 161:

  A developer is implementing an EJB 3.0 JMS message-driven bean with bean-managed transactions. Which two statements are true? (Choose two.)

  A. The message receipt is part of the user transaction.

  B. Messageacknowledgementis automaticallyhandledbythecontainer.

  C. Messages are always processed intheorder they were sent to the queue.

  D. Two messages read from the same queue may be processed at the same time within the same EJB container.

  Correct Answer: BD

• Question 162:

  The ejb-jar file format is a contract between which two EJB role pairs? (Choose two.)

  A. Deployer and System Administrator

  B. Application Assembler and Deployer

  C. Bean Provider and Application Assembler

  D. Bean Provider and EJB Container Provider

  E. EJB Server Provider and EJB Container Provider

  F. Application Assembler and EJB Container Provider

  Correct Answer: BC

• Question 163:

  Given :

  9. @Stateful

  10. @TransactionManagement(TransactionManagementType. BEAN)

  11. public class FacadeBean implements Facade { 12 @EJB Business business;㏑esource SessionContext ctx;

  13. public void startStuff0 throws Exception {

  14. ctx.getUserTransactionQ.beginO;

  15. business. doA0;

  16. business. doBQ;

  17.}

  18. public void endStuff0 throws Exception {

  19. ctx.getUserTransactionO.commit0;

  11. ©Stateless

  12. public class BusinessBean implements Business { 13.©Resource SessionContext ctx;

  14. public void doAO { ctx.setRollbackOnlyQ; }

  15. @TransactionAttributeO"ransactionAttributeType.REQUIRES_NEW)

  16. public void doBQj}

  A client calls startStuff and endStuff subsequently. Assuming NO other transaction- related metadata, which two statements are correct? (Choose two.)

  A. MethoddoB isnevercalled.

  B. The transactionin methoddoB is committed.

  C. The transactioninmethod doB is rolledback.

  D. An exception is thrown when calling method endStuff.

  E. An exception is thrown when calling method startStuff.

  Correct Answer: BD

• Question 164:

  A developer maps the abstract entityclass Account with concrete entity sub- classes CreditCardAccount and SavingsAccount using the single table per class hierarchy strategy. Which two statements are true? (Choose two.)

  A. Instances of CreditCardAccount and SavingsAccountarestoredinthe sametable.

  B. Allcolumns that correspondtofields declared inAccountmust bedefined asnullable in the database.

  C. The fields declared in Accountare storedin adifferent tablethan the ones declared in CreditCardAccount and SavingsAccount.

  D. All columns that correspond to fields declared in CreditCardAccount or SavingsAccount must be defined as nullable in the database.

  Correct Answer: AD

• Question 165:

  A developer has obtained a container-managed entity manager in a stateless session bean. Which two statements are correct? (Choose two.)

  A. Invoking the flush method without a transaction will throw an exception.

  B. Invoking the clear method without a transaction will throw an exception.

  C. Invoking the persist method without a transaction will throw an exception.

  D. Invoking the find method for an entity that does NOT exist will throw an exception.

  Correct Answer: AC

• Question 166:

  A Java EE 5 application contains a session bean which uses a security role USER. A group called people is defined in an LDAP server. Which two define appropriate EJB role responsibilities? (Choose two.)

  A. The deployer definesandconfigures the LDAP realm.

  B. The system administratordefines and configuresthe LDAPrealm.

  C. Thedeployermaps the application role USER totheLDAP group people.

  D. Thesystem administrator maps the application role USER totheLDAP group people.

  Correct Answer: BC

• Question 167:

  Which must result in the destruction of a stateful session bean?

  A. A client calls an @Remove method and the method returns successfully.

  B. The server in which the stateful session bean was created is restarted.

  C. The stateful session bean participates in a transaction that is rolled back.

  D. The stateful session bean is chosen as a last recently used (LRU) victim for passivation.

  Correct Answer: A

• Question 168:

  Which two APIs must an EJB 3.0 container make available to enterprise beans at runtime? (Choose two.)

  A. TheJXTAI.1API

  B. TheMIDP 2.0 API

  C. The Java SE 6 API

  D. The JavaSE5JNDIAPI

  E. TheJavaSE5 JDBCAPI

  Correct Answer: DE

• Question 169:

  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 170:

  Which statement about an entity instance lifecycle is correct?

  A. A new entity instance is an instance with a fully populated state.

  B. A detached entity instance is an instance with no persistent identity.

  C. A removed entity instance is NOT associated with a persistence context.

  D. A managed entity instance is the instance associated with a persistence context.

  Correct Answer: D