Oracle Oracle Certifications 1Z0-860 Questions & Answers

• Question 141:

  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.

  Correct Answer: D

• Question 142:

  The Java Persistence API defines a notion of propagation of a persistence context. Which statement is correct?

  A. Persistence context propagation is NOT supported for message-driven beans.

  B. Persistence context propagation is supported for any type of an entity manager.

  C. Persistence context propagation avoids the need for the application to pass references of entity manager instances.

  D. Persistence context propagation results in cloning of all managed instances for use by another instance of an entity manager.

  Correct Answer: C

• Question 143:

  Which two statements are correct? (Choose two.)

  A. An EJB 3.0 message-driven bean can itself be the client of another message-driven bean.

  B. The client of an EJB 3.0 message-driven bean can use the bean's remote business interface to communicate with the bean.

  C. Every client of an EJB 3.0 JMS message-driven bean must be a Java application that uses the JMS API to communicate with the bean.

  D. Messages sent to JMS topics are intended for only one receiver whereas messages sent to JMS queues are intended for multiple receivers.

  E. Ifthe client of an EJB 3.0 message-driven bean awaits a reply to its request, the client can set the JMSReplyTo attribute to provide routing information to the bean.

  Correct Answer: AE

• Question 144:

  Given :

  public class MyException extends Exception {}

  The business interface Foo declares a method work0: I. public void work0 throws MyException;

  The bean class FooBean contains the following:

  10.©Stateless

  II. @Remote(Foo.class)

  12.

  public class FooBean {

  13.

  public void workQ throws MyException {

  14.

  //do some work not shown here

  15.

  throw new MyException0; 16.}

  Assuming there is no deployment descriptor, which statement is true when the workQ method is invoked by a client with an existing transaction context and execution reaches Line 15?

  A. The container does notroll back thetransaction.

  B. The clientreceives javax.ejb.EJBTransactionRequiredException.

  C. The clientreceivesjavax.ejb.EJBTransactionRolledbackException.

  D. Thecontainer marks the transactionforrollback by calling the EJBContext.setRollbackOnly method.

  Correct Answer: A

• Question 145:

  The Java Persistent API defines certain rules for persistent entities. These rules are required by the persistent provider to manage entities at runtime. Which statement is correct, assuming NO mapping descriptor is used?

  A. Entitiesmust extenda persistent base class.

  B. Entities must implement the interface PersistentEntityto bemanaged bythepersistent provider.

  C. Afield withoutatransient modifier mustbeannotated as ©Tersistent tobe stored in the database.

  D. A field without a transient modifier must be annotated as ©Transient to NOT be stored in the database.

  Correct Answer: D

• Question 146:

  A developer wants to create a JMS message-driven bean that responds to javax.jms.TextMessage messages. Which two statements are true? (Choose two.)

  A. The developer must implement the ejbCreate method.

  B. The developer does NOT need to create a business interface for the bean.

  C. The developer must implement a method that declares javax.jms.TextMessage as an argument.

  D. The message-driven bean class must implement methods of the javax.jms.MessageListener interface.

  E. The message-driven bean class must implement methods of the javax. ejb. MessageDrivenBean interface.

  Correct Answer: BD

• Question 147:

  A developer creates a statelesssession bean, EmployeeServiceBean, and itsinterface, EmployeeSeivice. The session bean uses two annotated entity classes, Employee.class and Department.class. Which two packaging options can the developer use when creating a deployable EAR? The proposed directory structure is listed for each option. (Choose two.)

  A. emp.ear emp-ejb.jar META-INF/persistence. Xml EmployeeSeivice. Class EmployeeServiceBean. Class lib/emp-classes.jar Employee.class Department.class

  B. emp.ear META-INF/orm.xml emp-ejb.jar EmployeeSeivice. class EmployeeServiceBean. class Employee.class Department.class

  C. emp.ear emp-ejb.jar META-INF/persistence. xml Employee.class Department.class EmployeeSeivice. class EmployeeServiceBean. class

  D. emp.ear emp-ejb.jar persistence.xml Employee.class Department.class EmployeeSeivice. class EmployeeServiceBean. Class

  Correct Answer: AC

• Question 148:

  While executing a business method in a stateless session bean the container rolls back the method's transaction. Which three are possible causes for the container's behavior? (Choose three.)

  A. The bean uses container-managed transactions and invokes EJBContext.setRollbackOnly.

  B. The bean uses container-managed transactions and invokes EJBContext.getRollbackOnly.

  C. The business method invokes a method that throws an uncaught java.lang.NullPointerException.

  D. The business method throws a checked exception of a class type that is marked with the @ApplicationException annotation with the rollback element value false.

  E. The business method throws an unchecked exception of a class type that is marked with the @ApplicationException annotation with the rollback element value true.

  F. The bean uses container-managed transactions and throws a checked exception of a class type that is marked with the @ApplicationException annotation with the rollback element value false.

  Correct Answer: ACE

• Question 149:

  A developer needs to include a set of managed classes in a persistence unit. Which two solutions are correct? (Choose two.)

  A. Place the class filesinthe orm.xml file.

  B. Placetheclassfiles in therootof thepersistence unit.

  C. Place the classfilesin any mapping file that is includedonthe classpath.

  D. Placetheclass files inanyjar on the classpath that is included in the persistence unit.

  Correct Answer: BD

• Question 150:

  Given a stateless session bean with container-managed transaction demarcation, from which two methods can a developer access another enterprise bean? (Choose two.)

  A. beanconstructor

  B. Timeout callback method

  C. PreDestroy lifecycle callback method

  D. PostConstruct lifecycle callback method

  E. businessmethod fromthebusiness interface

  Correct Answer: BE