1Z0-895 試験問題を無料オンラインアクセス

A developer impalements an asynchronous implementation for calculating insurance proposals. The input data for the calculations is made available on a single message queue. Two types of insurance proposals will be calculated: car and life. Message with data for other insurance types are posted on the queue but should be left on the queue by this implementation.
Which statement is true?

• A.The developer will NOT succeed because all messages will be consumed from the queue.
• B.The developer can implement a push-back mechanism if the message is of the wrong type.
• C.The developer can use a messageSelector to receive only the car and life data message if the header contains properties to make selection.
• D.The developer can use a messageSelector to receive only the car and life data message if the JMS body contains selectable data.

A developer needs to deliver a large-scale enterprise application that connects developer chooses an EJB 3.1-compliant application server, which three are true about the EJB business component tier? (Choose three.)

• A.Clustering is guaranteed to be supported by the EJB 3.1 container.
• B.Thread pooling can be optimized by the Bean Provider programmatically.
• C.Bean Providers are NOT required to write code for transaction demarcation.
• D.Support for server fail-over is guaranteed for an EJB 3.1-compliant application server.
• E.Load-balancing is NOT a guarantee for all EJB 3.1 containers.
• F.EJB 3.1 compliant components are guaranteed to work within any Java EE 6 application server

Given the following stateful bean:
10.
@Stateful
11.
@TransactionAttribute(TransactionAttributeType.SUPPORTS)
12.
public class VideoBean implements video {
13.
/ / insert code here
14.
public void method () {}
15.
}
Assuming no other transaction-related metadata, which code can be added at line 13 to guarantee that business method methodA will execute only if invoked with an active transaction?

• A.@TransactionAttribute ()
• B.@TransactionAttribute(transactionAttributeType.MANDATORY)
• C.@transactionAttribute(TransactionattributeType.RECQUIRES_NEW)
• D.@transactionmanagement(TransactionAttributeType.CONTAINER)

A developer writes a stateful session bean FooBean with one remote business interface Foo. Foo defines an integer / setter method pair implemented as:
10.
private int value;
11.
public void setValue (int i) {value = i; }
12.
public int getValue () {return value; }
A session bean ClientBean has a business method doSomething and an ejb-ref with ejb-ref-name "fooRef" that is mapped to FooBean's Foo interface.
11.
@Resource private SessionContext SessionCtx;
12.
public void doSomething () {
13.
Foo foo1 = (Foo) sessionCtx.lookup("fooRef");
14.
Foo foo2 = (Foo) sessionCtx.lookup("fooRef");
15.
foo1.setvalue(1);
Which statement is true after the code at line 15 completes?

• A.Foo1.getValue () = = 1 and foo2.getValue() = = 0
• B.Foo1.getValue () = = 0 and foo2.getValue() = = 0
• C.Foo1.getValue () = = 1 and foo2.getValue() = = 1
• D.Foo1.getValue () = = 0 and foo2.getValue() = = 1

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.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.
• B.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.
• C.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.
• D.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.