Oracle Oracle Certifications 1Z0-860 Questions & Answers

• Question 51:

  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 52:

  A developer has created an application-managed entity manager. Which statement is correct?

  A. A new persistence context begins when the entity manager is created.

  B. A new persistence context begins when a new JTA transaction begins.

  C. A new persistence context begins when the entity manager is invoked in the context of a JTA transaction.

  D. A new persistence context begins when the entity manager is invoked in the context of a resource-local transaction.

  Correct Answer: A

• Question 53:

  Which statement describes a component definition that is allowed by the EJB 3.0 specification?

  A. A stateful session bean that is a Web service endpoint.

  B. A stateful session bean that has one remote business interface and is a Web service endpoint.

  C. A message-driven bean that has one message listener interface and is a Web service endpoint.

  D. A stateless session bean that has three local business interfaces and is a Web service endpoint.

  Correct Answer: D

• Question 54:

  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

  Correct Answer: AC

• Question 55:

  Given:

  A session bean Foo uses container-managed transactions. The container throws a javax.transaction.TransactionRolledBackException when the doStuff methodruns. 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 56:

  The Java Persistence entity Lineltem defines a composite primary key that is defined by the two columns ORDERID and LINEITEMID in the database. Which two are true? (Choose two.)

  A. Line ltem must define a primary key class to represent the composite primary key.

  B. The composite primary key is mapped as two fields in Lineltem. No extra primary key class is necessary.

  C. The combination of ©Embedded and @Embeddable annotations can be used to denote the composite primary key.

  D. The semantics of the equals and hashCode methods of the primary key class must be consistent with the database equality.

  Correct Answer: AD

• Question 57:

  A developer needs to deliver a large-scale enterprise application that connects to legacy systems. If the developer chooses an EJB 3.0-compliant application server, which three are true about the EJB business component tier? (Choose three.)

  A. Load-balancing is NOTaguarantee forallEJB 3.0 containers.

  B. Clustering is guaranteed tobe supported by theEJB 3.0 container.

  C. Thread pooling can be optimizedbythe BeanProviderprogrammatically.

  D. Bean Providers are NOT required towritecode for transaction demarcation.

  E. Support for server fail-over is guaranteedforan EJB 3.0-compliant application server.

  F. EJB3.0-compliantcomponentsare guaranteed to workwithinanyJavaEE5 application server.

  Correct Answer: ADF

• Question 58:

  Which statement is correct about a Java EE client of a message-driven bean?

  A. Theclientcan useJNDI toobtainareference to a message destination.

  B. The clientcan use JNDItoobtain a reference toadependency injection.

  C. The client canuseJNDI to obtain a reference to a message-driven bean instance.

  D. Theclient can use JNDI to look upareference tothemessage-driven bean's home interface.

  Correct Answer: A

• Question 59:

  Your application uses the Java Persistence API to access a database. This application must reject adding an instance to the database if it does NOT pass validation tests for values of two persistence properties. The database contains some data that will NOT pass such validation. Only the new records must be validated. Which option will achieve this behavior?

  A. Add validation logic tothesetter methods for each property.

  B. AddthePrePersist callbackmethodwithallofthevalidation logic.

  C. Addthe PostPersist callback methodwithall ofthevalidation logic.

  D. AddPrePersist and PreUpdate callback methods with allofthe validation logic.

  Correct Answer: B

• Question 60:

  A developer wantsto implement anassociation relationship betweenCarModel and CarManufacturer. Every car model is produced by a single manufacturer and every manufacturer produces many car models. While in this application it is essential to quickly determine the manufacturer of a model it is NOT necessary to determine which models a manufacturer produces. Given these requirements, which is an appropriate solution?

  A. In CarModel class, declare an attribute of type CarManufacturer and annotate it with @OneToMany.

  B. In CarModel class, declare an attribute of type CarManufacturer and annotate it with @ManyToOne.

  C. In CarManufacturer class, declare an attribute of type CarModel and annotate it with @OneToMany.

  D. In CarManufacturer class, declare an attribute of type Collection and annotate it with @OneToMany.

  E. In CarModel class, declare an attribute of type Collection and annotate it with @ManyToOne.

  Correct Answer: B