Oracle 1Z0-860 Online Practice Questions and Exam Preparation

Oracle 1Z0-860 Online Questions & Answers

• Question 21:

  A developer writes an enterprise application and packages it into an .ear file. The application contains two persistence units defined at the .ear level with persistence unit names FooPU and BarPU. The application also contains an ejb-jar with one stateless session bean. Which code, when added to the stateless session bean class, injects an EntityManagerFactory at runtime?

  A. PersistenceUnit private EntityManagerFactory emf; B. PersistenceContext private EntityManagerFactory emf;
  B. PersistenceUnit(unitName="BarPU") private EntityManagerFactory emf;
  C. Resource(name="BarPU", type=EntityManagerFactory.class) private EntityManagerFactory emf;
  C. Resource(name="BarPU", type=EntityManagerFactory.class) private EntityManagerFactory emf;

• Question 22:

  A developer wants to achieve the following two behaviors:

  (1)

  If a client calls a business method without a transaction context, the container will invoke the bean in an unspecified transaction context.

  (2)

  If a client calls a business method with a transaction context, the container will suspend the association of the transaction context with the current thread before invoking the enterprise bean's business method. Which transaction attribute should be used?

  A. NEVER
  B. REQUIRED
  C. SUPPORTS
  D. NOT SUPPORTED
  D. NOT SUPPORTED

• Question 23:

  A developer implements a session bean with a method doStuff which behaves differently depending on the caller's security role. Only users in security roles "ADMIN" and "USER" are allowed to call the method. Assume that there is no security-related metadata in the deployment descriptor. Which two, taken in combination, are appropriate to accomplish this? (Choose two.)

  A. Annotate method doStuff with @PermitAII.
  B. AnnotatemethoddoStuff with@RolesAllowed({"ADMIN","USER"})
  C. If EJBContext.getCallerPrincipal returns role "ADMIN", implement thebehaviorfor users in role ADMIN.
  D. If EJBContext.isCallerlnRole("ADMIN") returns true, implement the behavior defined for users in role "ADMIN".
  B. AnnotatemethoddoStuff with@RolesAllowed({"ADMIN","USER"})
  D. If EJBContext.isCallerlnRole("ADMIN") returns true, implement the behavior defined for users in role "ADMIN".

• Question 24:

  Which two options can be used to predefine Java Persistence queries for easy use? (Choose two.)

  A. @NamedQuery annotation
  B. @NamedNativeQuery annotation
  C. using the named-query element in the XML descriptor
  D. usingthenamed-native-queryelementintheXML descriptor
  A. @NamedQuery annotation
  C. using the named-query element in the XML descriptor

• Question 25:

  Which component can use a container-managed entity manager with an extended persistence context?

  A. any EJB component
  B. only stateful sessionbeans
  C. only stateless session beans
  D. session beans and web components
  B. only stateful sessionbeans

• Question 26:

  A company has a business application that allows end users to order products over the web. A developer in the company wants to add the following capability to the application:

  When the web-tier handles a new order, it should notify all the interested beans in the EJB-tier. To satisfy this new capability, the developer wants to use a message-driven bean and must choose between associating it with a javax.jms.Topic

  destination or a javax.jms.Queue destination. Which two are true about this decision? (Choose two.)

  A. JMS Topics are intendedtobe usedtosolvethistype of scenario.
  B. JMS Queues areintendedto be used to solvethistype of scenario.
  C. OnlyQueue destinations allow for messages tosurvivea server crash.
  D. Topic destinationsallowthe developer to configure subscription durability.
  A. JMS Topics are intendedtobe usedtosolvethistype of scenario.

• Question 27:

  A developer wants to have bookingDate stored in table BOOKING, flightNumber in table FLIGHTBOOKING, and hotelName in table HOTELBOOKING. Which code, inserted at Line 11 of class Booking, is appropiate for this strategy?

  A. ©Joined
  B. @SingleTable
  C. @TablePerClass
  D. @lnheritance(strategy=JOINED)
  E. @lnheritance(strategy=SINGLE_TABLE)
  F. @lnheritance(strategy=TABLE_PER_CLASS)
  D. @lnheritance(strategy=JOINED)

• Question 28:

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

  11.

  public MyMDBOJ System, out. print("a "); }

  12.

  public void onMessage(Message m) { System, out. print("b "); }

  13.

  @PreDestroy

  14.

  public void removeQ { System, out. print("c "); } The container crashes and then restarts and then the bean class handles two messages.

  Which four are possible results? (Choose four.)

  A. abb
  B. acbb
  C. aa c bb
  D. aab b c
  E. a bcb c
  F. ababc c
  A. abb
  C. aa c bb
  D. aab b c
  F. ababc c

• Question 29:

  A developer is working with an entity User, which has an identity field and a salary field. Which Java Persistence query will return those users with the highest salaries?

  A. SELECT u FROM User u WHERE u.salary >= ALL (SELECT d.salary FROM User d)
  B. SELECT u FROM User u WHERE u.salary >= ANY (SELECT d.salary FROM User d)
  C. SELECT u FROM User u WHERE ALL(u.salary >= (SELECT d.salary FROM User d))
  D. SELECT u FROM User u WHERE u.salary >= (SELECT ALL(d.salary) FROM User d)
  A. SELECT u FROM User u WHERE u.salary >= ALL (SELECT d.salary FROM User d)

• Question 30:

  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.classDepartment.class
  C. emp.ear emp-ejb.jar META-INF/persistence. xml Employee.classDepartment.class EmployeeSeivice. class EmployeeServiceBean.class
  D. emp.ear emp-ejb.jar persistence.xml Employee.class Department.class EmployeeSeivice. class EmployeeServiceBean.Class
  A. emp.ear emp-ejb.jar META-INF/persistence.xml EmployeeSeivice.class EmployeeServiceBean. class lib/emp-classes.jar Employee.class Department.class
  C. emp.ear emp-ejb.jar META-INF/persistence. xml Employee.classDepartment.class EmployeeSeivice. class EmployeeServiceBean.class