Oracle 1Z0-895 問題集

質問 1：
A developer creates a stateful session bean that is used by many concurrent clients. The clients are written by other development team; and it is assumed that these clients might not remove the bean when ending their session. The number of concurrent sessions will be greater than the defined bean cache size.
The developer must consider that the state of the session bean can be influenced by either passivation or timeout.
Which three actions should the developer take to make the bean behave correctly in passivation and timeout situations? (Choose three.)
A. Re-establish references to resources in an @Init annotated method.
B. Release references to resources in a @PreDestroy annotated method.
C. Re-establish references to resources in a @PostActivate annotated method.
D. Release references to resources in a @PrePassivate annotated method.
E. Release references to resources in a @Remove annotated method.
正解：B,C,D

質問 2：
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. The System Administrator can add interceptor binding information at runtime, using vendorspecific tools.
B. The Application Assembler can add a deployment descriptor to the ejb-jar that includes interceptor binding information.
C. The Application Assembler can add metadata annotations to the ejb-jar.
D. The Deployer can add metadata annotations to the ejb-jar.
E. No solution is possible under these conditions.
正解：B

質問 3：
Suppose an EJB named HelloWorldBean is deployed as a standalone ejb-jar. Assuming the HelloWorldBean is implemented as follows:

Which HelloWorldBean methods are accessible by another EJB within the same ejb-jar?
A. All of the methods declared in HelloWorldBean
B. All of the public methods declared in HelloWorldBean
C. All of the methods declared in HelloWorld and HelloWorldBean
D. All of the public methods declared in HelloWorld and all of the methods declared in HelloWorldBean
正解：B
解説: (Topexam メンバーにのみ表示されます)

質問 4：
A developer implements a CMT session bean with a method storeBoth which inserts data both a related database and an LDAP server. The relational database supports transactions while the LDAP system does NOT.
Given that both updates should succeed or be rolled back, while is the best solution?
A. Define the transaction attribute of the method storeBoth as REQUIRED. The container manages the transactions and will roll back modifications if something goes wrong in either database insert or LDAP insert.
B. Define the transaction attribute of the method storeBoth as REQUIRED_NEW. Carry out the database insert first. Subsequently, execute the LDAP inserts, catching LDAP exceptions. If exceptions are raised, call the SessionContext.setRollBackOnly method.
C. Define the transaction attribute of the method storeBoth as REQUIRED_NEW. Carry out the LDAP insert first. If SessionContext.getRollBackOnly returns false, execute the database inserts, catching SQL exceptions. If exceptions are raised, call the SessionContext.setRollBackOnly.
D. Implement the SessionSynchoronization interface in the session bean. In the afterCompleteion method, the LDAP inserts are rolled back if false is passed as an argument to the afterCompletion method.
正解：B
解説: (Topexam メンバーにのみ表示されます)

質問 5：
A developer wants to create an enterprise bean that uses the EJB Timer service.
Which two are true? (Choose two.)
A. The bean can be used within a transaction.
B. The developer can use either a message-driven bean, stateless session bean, or stateful session bean.
C. Once created, the timer will survive a container crash.
D. Once created, a timer cannot be canceled.
E. The enterprise bean must implement the TimedObject interface.
正解：A,C
解説: (Topexam メンバーにのみ表示されます)

質問 6：
A developer writes a stateless session bean FooBean and uses its deployment descriptor to declare a local ejb dependency on a stateful session bean in the same ejb-jar.

Which environment annotation, when declared within the FooBean bean class, is equivalent to the ejb-local-ref shown above?
A. @EJB(name="barRef", beanName="BarBean") Private acme.Bar bar;
B. @EJB(name="bar", beanName="BarBean") Private acme.Bar barRef;
C. @EJB(name="ejab/barRef", beanName="BarBean") Private acme.Bar bar;
D. @EJB(beanName="BarBean") Private acme.Bar barRef;
正解：A
解説: (Topexam メンバーにのみ表示されます)

質問 7：
Which statement about message-driven beans is correct?
A. 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.
B. Each message-driven bean instance will be invoked by only one thread at a time.
C. 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.
D. When dispatching messages to message beam instances the container must preserve the order in which messages arrive.
正解：B