Oracle Oracle Certifications 1Z0-860 Questions & Answers

• Question 281:

  A developer implements a session bean which acts as a session facade for an application. This means that clients will only see this session bean's interface which offers the application interface. There are three distinct roles known at development time"user", "admin", and "guest". The majority of the methods will be used by role "user". All methods must have role permissions active and roles may be added or changed in the future. Which two scenarios are correct? (Choose two.)

  A. The developer annotates the bean class with @PermitAII and annotates the methods used by role"guest" or "admin" individually.

  B. The developer annotates the bean class with @DenyAII and annotates the methods used by role"user", "guest", or "admin" individually.

  C. The developer defines individual method permissions for the methods used by roles "user","guest", and "admin" in the deployment descriptor.

  D. The developer annotates the bean class with @RolesAllowed("user") and annotates the methods used by role "guest" or "admin" individually.

  E. Thedeveloper defines a method permission with method name "*" and role "user" and adds individual method permissions for the methods used by roles "guest" and "admin" in the deployment descriptor.

  Correct Answer: DE

• Question 282:

  The ejb-jar file format is a contract between which two EJB role pairs? (Choose two.)

  A. Deployer and System Administrator

  B. Application Assembler and Deployer

  C. Bean Provider and Application Assembler

  D. Bean Provider and EJB Container Provider

  E. EJB Server Provider and EJB Container Provider

  F. Application Assembler and EJB Container Provider

  Correct Answer: BC

• Question 283:

  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 284:

  A developer writes a stateful session bean called FooBean. Which code can be inserted before Line 11 of the FooBean class to define a TYPE-level environment dependency on a JMS Topic?

  11.

  public class FooBean {

  12.

  13.

  public void fooQ {}

  14.

  15.}

  A. @Resource(type=Topic. class)

  B. @Resource(name="topicRef) private static Topic topic;

  C. ©ResourceprivateTopic topic;

  D. @Resource(name="topicRef', type=Topic. class)

  Correct Answer: D

• Question 285:

  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 286:

  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. MessageDnvenBean interface.

  Correct Answer: BD

• Question 287:

  A Reader entity has a one-to-many, bidirectional relationship with a Book entity. Two Reader entities are persisted, each having two Book entities associated with them. For example, readeM has booka and bookb, while reader2 has bookc and bookd. Which query returns a Collection of fewer than four elements?

  A. SELECT b.reader FROM Book b

  B. SELECT r FROM BookbINNER JOINb.readerr

  C. SELECTrFROM Reader r INNER JOIN r.booksb

  D. SELECTrfrom BookbLEFT JOIN b.readerr LEFTJOINFETCHr.books

  Correct Answer: C

• Question 288:

  A session bean's business method throws an exception during execution. Which two are responsibilities of the Bean Provider when throwing the exception? (Choose two.)

  A. For application exceptions, ensure that if the current transaction commits there will be no loss of data integrity.

  B. For application exceptions, ensurethatthe current transaction will commit.

  C. For system errors, when the client is remote, throw a java.rmi.RemoteException that wraps the original exception.

  D. For checked exceptions from which the bean cannot recover, throw an EJBException that wraps the original exception.

  Correct Answer: AD

• Question 289:

  An enterprise developer needs to modify the order of interceptor method execution specified by the Bean Provider, but does NOT have access to the bean's source code. No deployment descriptor was provided in the ejb-jar delivered by the Bean Provider. Which represents the solution to this problem?

  A. No solution is possible under these conditions.

  B. TheDeployer canadd metadataannotations totheejb-jar.

  C. The Application Assembler can add metadata annotations to the ejb-jar.

  D. TheSystem Administrator can addinterceptorbinding informationatruntime, using vendorspecific tools.

  E. TheApplication Assembler canaddadeployment descriptor totheejb-jarthat includesinterceptor binding information.

  Correct Answer: E

• Question 290:

  A developer writes a session bean which uses several configurable constants. The constants are all defined as String types in JNDI. This cannot be changed because existing code is using the same JNDI information. One of the constants is a date, represented in string format. This date constant is used in multiple business methods of this session bean, actually as a Date object. Converting strings to dates is an expensive operation; therefore, the developer wants to do as little converting as possible. Which two scenarios can be used to prevent converting from String to Date in every business method? (Choose two.)

  A. Loadthe date string in an instance Date type variablebyannotation of the instance variable and let the container autoconvert it to a Datetypeautomatically.

  B. Load thedate string in an instance String type variablebyannotation of this instance variableandconvertitto aDatetype object in the beans constructor.

  C. Load thedatestringinaninstanceString typevariableby annotationof this instance variable and convert it to aDate typeobjectin a@PostConstructannotatedmethod.

  D. Load the date string in an instance Date typevariableby annotation ofasetter method that takes a String and which carries out the conversion and assigns the value totheinstance variable.

  Correct Answer: CD