Oracle Oracle Certifications 1Z0-860 Questions & Answers

• Question 81:

  Consider the following classes: 11.©Entity Auction {

  12.

  @ld int id;

  13.

  @OneToOne Item item;

  14.}

  11.©Entity Itemj

  12.

  @ld int id;

  13.

  @OneToOne (mappedBy="item") Auction auction;

  14.

  }

  Given that the Auction entity maps to an AUCTION database table and the Item entity maps to an ITEM database table, which statement is correct assuming there is NO mapping descriptor?

  A. The relationship is mapped to a foreign key in the ITEMtable.

  B. Therelationship is mapped usingajointableAUCTIONJTEM.

  C. The relationship is mappedtoaforeignkeyinthe AUCTIONtable.

  D. The relationshipis mapped to foreignkeysinbothITEMandAUCTION tables.

  Correct Answer: C

• Question 82:

  Which example of Java Persistence identity definitions is portable and correct assuming NO mapping descriptor is present?

  A. ©Entity public class A { @ld private float id; // more code here }

  B. @ldClass(com. acme. LineltemPK. class) ©Entity public class Lineltem { @ld int orderld; @ld int lineltemld; // more code here }

  C. @Entity public class Project { @ld@GeneratedValue(strategy=TABLE) public String getProjectldQ {return pid;} // more code here }

  D. ©Entity public class Employee { @ld public Java.util.Date getBirthdayO {return bday;} // more code here

  Correct Answer: B

• Question 83:

  A developer writes a stateless session bean with a constructor, a PostConstruct method, a PreDestroy method, and this business method:

  11.

  public String helloQj

  12.

  return "hello";

  13.}

  The container invokes the hello method on an instance of the bean. Which is true about that bean instance when control reaches Line 12?

  A. The constructor has NOT been invoked.

  B. ThePreDestroymethodhasbeeninvoked.

  C. The PostConstruct method has been invoked.

  D. Both the PostConstruct and PreDestroy methods have been invoked.

  Correct Answer: C

• Question 84:

  Which Java Persistence query uses the aggregate function correctly, assuming that chairs field is of type int?

  A. SELECT ANY(r. chairs) FROM Room r

  B. SELECT NEW Integer(MAX(r. chairs)) FROM Room r

  C. SELECT r FROM Room r WHERE r.chairs > AVG(r.chairs)

  D. SELECT c FROM Chair c WHERE LOCATE (c.type, lazyboy) > -1

  Correct Answer: B

• Question 85:

  FooBean is an EJB 3.0 session bean that can make valid use of UserTransaction. Which is guaranteed to work in an EJB container for FooBean to obtain the UserTransaclion object?

  A. Invoke a method on a SessionContext that returns a UserTransaction object.

  B. Perform JNDI lookup with name "java:/UserTransaction" on an InitialContext.

  C. Perform JNDI lookup with the name "jdbc/UserTransaction" on an InitialContext.

  D. Use the @TransactionManagement annotation to inject an instance variable of type UserTransaction in a bean class.

  Correct Answer: A

• Question 86:

  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.

  NOTSUPPORTED

  Correct Answer: C

• Question 87:

  A developer is declaring a persistent entity that will be passed as a detached object through a remote interface to an application client. Which two characteristics must the corresponding persistent entity class have? (Choose two.)

  A. implement serializable

  B. includeano-arg constructor

  C. make instance variables public

  D. implement the remote interface

  Correct Answer: AB

• Question 88:

  A developer writes a stateful session bean with local business interface Bar containing method test. Method test is implemented as

  11.

  ©Remove

  12.

  public void testfj {}

  A business method in a stateless session bean invokes a reference to bean Bar as follows :

  11. @EJB Bar bar; 12.

  13.

  public void foo0 {

  14.

  bar.testfj;

  15.

  bar.testO;

  16.}

  Assuming execution reaches Line 15, what is the expected result?

  A. Method foo returns withouterror.

  B. Ajavax.ejb.NoSuchEJBException is thrown.

  C. Ajava.rmi.NoSuchObjectException is thrown.

  D. Ajavax.ejb.NoSuchEntityException is thrown.

  Correct Answer: B

• Question 89:

  An enterprise bean has security permissions set up using declarative security features. Under which two conditions can a client be guaranteed to have permission to invoke a business method on the enterprise bean? (Choose two.)

  A. The Application Assembler has marked the enterprise bean methodasunchecked.

  B. The client's principalhas beenassigned a securityrolewithpermissionto invokethe method.

  C. The Application Assembler has set the security-identity deployment descriptor to run- as.

  D. TheApplicationAssemblerhas mapped all security role references using the role-link element.

  Correct Answer: AB

• Question 90:

  Which option will a developer use to obtain a MessageDrivenContext in a message- driven bean class written to the EJB 3.0 API?

  A. Implement the MessageDrivenBean interface.

  B. Specify MessageDrivenContext as a constructor parameter.

  C. Declare a dependency on the MessageDrivenContext interface.

  D. Specify MessageDrivenContext as a parameter of the onMessage method.

  Correct Answer: C