Oracle Oracle Certifications 1Z0-860 Questions & Answers

• Question 261:

  A developer writes a stateful session bean FooBarBean with two local business interfaces Foo and Bar. The developer wants to write a business method called getBarfor interface Foo that returns a Bar reference to the same session bean identity on which the client invokes getBar. Which code, when inserted on Line 12 below, implements the getBar method with the wanted behavior?

  10.

  ©Resource SessionContext sessionCtx;

  11.

  public BargetBarOJ

  12.

  13.}

  A. return(Bar)this;

  B. return(Bar) new FooBarBeanQ;

  C. return (Bar) sessionCtx.lookup("FooBarBean")

  D. return (Bar) sessionCtx.getBusinessObject(Bar.class);

  E. InitialContextic= new InitialContextQ; return (Bar) ic.lookup("java:comp/env/ejb/FooBarBean");

  Correct Answer: D

• Question 262:

  Which statement about the combination of mapping defaults, annotations, and XML descriptors is correct?

  A. All mapping annotations must always be processed by the persistence provider.

  B. Some annotations, like the @Entity annotation, must always be processed by the persistence provider.

  C. The mapping information for an entity class specified by annotations and in XML descriptors must be distinct.

  D. If multiple entity listeners are defined, the order in which they are invoked can be defined or overwritten in the XML descriptor.

  Correct Answer: D

• Question 263:

  A developer wants to release resources within a stateless session bean class. The cleanup method should be executed by the container before an instance of the class is removed. The deployment descriptor is NOT used. Which three statements are correct? (Choose three.)

  A. The cleanup method may declare checked exceptions.

  B. The cleanupmethodmusthave noarguments andreturn void.

  C. The cleanup method isexecuted inan unspecifiedtransactionand security context.

  D. The developer should mark the cleanup methodwiththe @PreDestroy annotation.

  E. The developershouldmark thecleanupmethodwiththe @PostDestroy annotation.

  F. Thecleanup method is executed inthetransactionandsecurity context ofthelast business method invocation.

  Correct Answer: BCD

• Question 264:

  Given:

  A session bean Foo uses container-managed transactions The container throws a javax.transaction.TransactionRolledBackException when the doStuff method runs. Which transaction attribute can the doStuff method have for this to occur?

  A. NEVER

  B. MANDATORY

  C. REQUIRES_NEW

  D. NOT SUPPORTED

  Correct Answer: B

• Question 265:

  Within a Java EE environment, which annotation can be used to inject an entity manager factory?

  A. ©Entity

  B. ©Factory

  C. @JTAFactory

  D. @PersistenceUnit

  E. ©PersistenceContext

  Correct Answer: D

• Question 266:

  Given this code snippet from a JMS message-driven bean class X:

  11.

  public XQ { System, out. print("1 "); }

  12.

  public void onMessagefMessage m) throws Java. rmi. RemoteException

  13.

  try {

  14.

  TextMessage tm = (TextMessage) m;

  15.

  String text = tm.getText0;

  16.

  System, out. print("2 ");

  17.

  } catch (JMSException e) {

  18.

  throw new java. rmi. RemoteExceptionQ; 19.} 20.} When this bean class handles a message, which is correct?

  A. After a messagedelivery theresultis1.

  B. Aftera message delivery the resultis2.

  C. Aftera message delivery the result is12.

  D. Afteramessage delivery an exception isthrown.

  E. After a message delivery the resultisunpredictable.

  F. This isNOTanEJB3.0 compliant bean.

  Correct Answer: F

• Question 267:

  Which statement is true about the primary key of a Java Persistence entity?

  A. The primary key cannot be overriden by a mapping descriptor.

  B. The location of the primary key defines the topmost entity class in the hierarchy.

  C. If property-based access is used, the properties of the primary key class must be public or protected.

  D. At least part of a primary key must be defined in the class that is the topmost class of an entity which is defined by a hierarchy of classes.

  Correct Answer: C

• Question 268:

  A User entity is in a one-to-many relationship with a Book entity. Assume that a developer has a function fetchBook(String title) that fetches a Book entity with the given title title. Also assume that the developer has an entity manager em. Which query can be used to return the user that holds the book titled "Java"?

  A. em.createQueryfSELECT u FROM User u where :great IN

  B. books.title").setParameter("great","Java")

  C. em.createQuery("SELECT u FROM User u where :great IN

  D. books"). setParameter("great",fetchBook("Java"))

  E. em.createQuery("SELECT u FROM User u where :great MEMBER OF

  F. books.title"). setParameter("great" ."Java")

  G. em.createQuery("SELECT u FROM User u where :great MEMBER OF

  H. books"). setParameter("great",fetchBook("Java"))

  Correct Answer: D

• Question 269:

  Given this Java EE application that uses a JTA application-managed entity manager:

  20.

  UserTransaction utx = ...;

  21.

  utx.beginQ;

  22.

  // insert code here

  23.

  utx.commitQ;

  Which two code fragments can be used on Line 22 to persist an order instance assuming that all references are properly initialized? (Choose two.

  A. em.merge(order); em.flushQ;

  B. em.persist(order); em.flushO;

  C. em.joinTransactionO; em.persist(order);

  D. em = emfcreateEntityManagerQ; em.persist(order);

  Correct Answer: CD

• Question 270:

  A developer writes two session beans which cooperate. The first session bean, ShoppingCart, collects orders and is implemented as a stateful session bean. The second session bean, CalculateDiscount, is implemented as a stateless session bean and runs on a different server. ShoppingCart contains the method getTotalPrice, which calculates the total price of the order in the ShoppingCart, including discounts. Discounts are calculated by CalculateDiscount using the information on the ShoppingCart bean, combined with data from a database. Which scenario can accomplish this?

  A. The CalculateDiscount offers a method calculate which is invoked by the ShoppingCart bean passing the this reference.

  B. The CalculateDiscount offers a method calculate which is invoked by the ShoppingCart bean. CalculateDiscount accesses the ShoppingCart instance by JNDI lookup.

  C. The CalculateDiscount offers a method calculate which is invoked by the ShoppingCart bean passing its reference obtained from the SessionContext.getBusinessObject method.

  D. The CalculateDiscount offers a method calculate which is invoked by the ShoppingCart bean. CalculateDiscount accesses the state of ShoppingCart by dependency injection.

  Correct Answer: C