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, reader! 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
An enterprise developer has received ejb-jars from multiple Bean Providers and wants to combine them into a single ejb-jar as well as altering the method permissions on some of the beans without recompiling any of the code contained in the ejb-jar. Which is correct?
A. Bean Provider is the only role that can perform this task.
B. Deployeris the most appropriaterole toperform thistask.
C. EitheraDeployer or System Administrator role may perform this task.
D. This problem cannot be solved using an EJB 3.0-compliant approach.
E. ApplicationAssembleris the mostappropriate roletoperform this task.
Given the following code snippet of an EJB 3.0 entity class: 10.©Entity
11.
@Table(name="ORDERS")
12.
public class Orderj.... }
A developer wants to change the name of the database table for the Order entity from ORDERS to CUSTOM, without changing the Java source code file. Which option can the developer use?
A. Override the name using the table subelement within the persistence unit's persistence.xml file.
B. This is NOT possible in a portable EJB 3.0 application. The only way to change the table name is to change the Java source code file.
C. Add a custommapping.xml file to the persistence unit, override the name using the table subelement, and declare custommapping.xml in the mapping-file element in orm.xml.
D. Add a custommapping.xml file to the persistence unit, override the name using the table subelement, and declare custommapping.xml in the mapping-file element in persistence.xml.
A developer is writing client code for an EJB 3.0 message-driven bean that is listening on a JMS queue. Which statement is true?
A. The transaction context of the client is propagated to the bean.
B. If the bean instance crashes the client will need to resend all pending requests.
C. The client can call the bean method annotated with @Remove to remove the message-driven bean instance.
D. Requests sent by the client while the EJB server is down are processed by the bean after restarting the server.
Which statement about message-driven beans is correct?
A. Each message-driven bean instancewill beinvoked onlyone thread ata time.
B. When dispatching messages to message bean instances the container must preserve the order in which messages arrive.
C. If a message-driven bean is associated with a JMS queue, each bean instance in the pool will receive each message sent to the queue.
D. If a message-driven bean is associated with a JMS durable subscription, each bean instance in the pool will receive each message sent to the durable subscription.
XYZ Software develops business components using both the EJB 2.1 and EJB 3.0 APIs. Some customers are reluctant to completely migrate to the EJB 3.0 model, but are willing to have EJB 2.1 session beans invoke EJB 3.0 session beans. How should XYZ Software enhance these components to meet this customer requirement?
A. Use @EJBtoinjectareference totheEJB 3.0 businessinterfaceinto the EJB 2.1beanclass.
B. Use
C. Addan EJB3.0-stylebusiness interface to EJB 2.1 beans to achieve interoperability between EJB 2.1 and EJB 3.0 beans.
D. Use @RemoteHome and @LocalHome to adapt EJB 3.0 beans so that EJB 2.1 beans can look up the adapted home interfaces using JNDI.
Which two can be specified by both the Bean Provider and the Application Assembler? (Choose two.)
A. security roles
B. enterprise bean type
C. transaction attributes
D. session bean's state-management type
E. enterprise bean's remote home interface
F. enterprise bean's local business interface
Which two are programming restrictions in the EJB 3.0 specification? (Choose two.)
A. An enterprisebean must NOTattempttoloadanative library.
B. An enterprise bean must NOT declare static fieldsasfinal.
C. An enterprisebeanmust NOTattemptto createa newsecurity manager.
D. An enterprise bean mustNOTpropagate a RuntimeExceptiontothe container.
E. An enterprise bean must NOTattemptto obtain ajavax.naming. InitialContext.
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
A session bean calls the setRollbackOnly method on the EJBContext interface within a business method with an active transaction. Which two are correct? (Choose two.)
A. The transaction timeout is immediately disabled.
B. The container will ensure that the transaction will never commit.
C. The bean must have started the current transaction for this to be legal.
D. The bean must have bean-managed transaction demarcation for this to be legal.
E. Thebean must have container-managed transaction demarcation for this to be legal.
Nowadays, the certification exams become more and more important and required by more and more enterprises when applying for a job. But how to prepare for the exam effectively? How to prepare for the exam in a short time with less efforts? How to get a ideal result and how to find the most reliable resources? Here on Vcedump.com, you will find all the answers. Vcedump.com provide not only Oracle exam questions, answers and explanations but also complete assistance on your exam preparation and certification application. If you are confused on your 1Z0-860 exam preparations and Oracle certification application, do not hesitate to visit our Vcedump.com to find your solutions here.