Oracle 1Z0-895 問題集

質問 1：
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. Thread pooling can be optimized by the Bean Provider programmatically.
B. EJB 3.1 compliant components are guaranteed to work within any Java EE 6 application server
C. Clustering is guaranteed to be supported by the EJB 3.1 container.
D. Support for server fail-over is guaranteed for an EJB 3.1-compliant application server.
E. Bean Providers are NOT required to write code for transaction demarcation.
F. Load-balancing is NOT a guarantee for all EJB 3.1 containers.
正解：B,E,F
解説: (Topexam メンバーにのみ表示されます)

質問 2：
Given the following stateless session bean implementation classes:

Assuming no other transaction-related metadata, what are the transaction attributes of methodA, methodB, and methodC respectively?
A. REQUIRED, REQUIRES_NEW, and REQUIRES_NEW
B. MANDATORY, MANDATORY , and MANDATORY
C. MANDATORY, MANDATORY , and REQUIRES_NEW
D. REQUIRED, MANDATORY, and REQUIRES_NEW
正解：D

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 writes an interceptor class called FooInterceptor containing the following AroundInvoke method:
11.
@AroundInvoke
12.
public Object intercept (InvocationContext ctx) {
13.
return "intercepted";
14.
}
FooInterceptor is applied to a business method in a stateless session bean:
11.
@Interceptors (FooInterceptor.class)
12.
public String testzero(int i) {
13.
return (i = = 0) ? "zero": "not zero"
14.
}
Which describes the result when a client invokes the testzero method with a value of 1?
A. The client receives a return value of "zero".
B. The client receives a return value of "not zero".
C. The interceptor method is NEVER invoked.
D. The client receives a return value of "intercepted".
正解：D

質問 5：
A stateful session bean needs to restore its conversational state to its initial state if the transaction in which the bean is participating rolls back.
Which bean method can be used to do this?
A. SessionSynchrinization.beforeCompletion
B. SessionContext.setRollbackOnly
C. SessionContext.getUserTransaction
D. SessionSynchronization.afterCompletion
正解：D
解説: (Topexam メンバーにのみ表示されます)

質問 6：
Which must result in the destruction of a stateful session bean?
A. The stateful session bean participates in a transaction that is rolled back.
B. A client calls an @Remove method and the method returns successfully.
C. The stateful session bean is chosen as a last recently used (LRU) victim for passivation.
D. The server in which the stateful session bean was created is restarted.
正解：B
解説: (Topexam メンバーにのみ表示されます)

質問 7：
A developer writes three interceptor classes: AInt, BInt, and CInt. Each interceptor class defines an AroundInvoke method called interceptor. In the ejb-jar.xml descriptor, CInt is declared as the default interceptor.
FooBean is a stateless session bean with a local business interface Foo that declares a method Foo ():
10.
@Stateless
11.
@Interceptors(AInt.class)
12.
public class FooBean Implements Foo {
13.
14.
@Interceptors (BInt.class)
15.
@ExcludeClassInterceptors
16.
public void foo () {}
17.
}
What is the interceptor order when the business method foo () is invoked?
A. CInt, AInt, BInt
B. BInt
C. BInt, AInt, CInt
D. CInt, BInt
正解：D
解説: (Topexam メンバーにのみ表示されます)