Oracle 1Z0-807 問題集

質問 1：
The integration team has reported a problem in testing a few deployed MDBs. By design, each MDB listens to one of four named queues. Two producers write messages to each queue. The test issues messages of the same payload type that each producer will send, but varies the number or size of these messages to measure the messaging server's performance.
The team has noticed that the utilization remains at the same high rate any time the test writes messages destined for the third MDB. The message server log does not reveal any failure in sending messages to this MDB. Which anticipation expresses cause for this condition?
A. Leaky Abstraction
B. Hot Potato
C. Golden Hammer
D. Cache less Cow
正解：B

質問 2：
A company wants to design an internal website for the purpose of managing its numerous social events. The site will not have heavy traffic, but will require state to be persisted in a database. You have been tasked to complete this action item in your spare time.
Which two Java EE-based approaches are best suited for quick development?
A. Useyourdomain modelcomponents as JavaServer Faces (JSF) managed beans.
B. Use message-driven beans to manage the posting of events.
C. Use JPAin the web tier only.
D. Use an Enterprise javaBeans (EJB) container to service-inject the domain model and support a JPA deployment.
正解：A,C

質問 3：
Which statement is true about the use of security-related annotations in an enterprise bean?
A. They can be used to change an authentication mechanism.
B. They can be used to specify permissions only on business methods.
C. They can be used to specify permissions on a class or its business methods.
D. They can be used to acquire a secure connection using SSL.
E. They can be inherited from a parent abstract class.
正解：C

質問 4：
You are the architect for XYZ bank. XYZ is redesigning their online banking offering and you need to ensure that the new design follows security best practices for the JEE platform.
Select three security best practices for JEE applications.
A. Encrypt data, both on the wire and at rest.
B. Schedule regular penetration testing.
C. Implement an exception-handling strategy.
D. Log all security related application events.
E. Treat users as untrusted even when authenticated.
F. Use both programmatic and declarative security.
正解：C,D,F

質問 5：
While analyzing an existing web application, you observe the following issues in the source code:
-Duplicatecontrol code is scattered throughout various view. -Businessand presentationlogicare mixed within these view.
The next phase of the project involves refactoring the existing code to address these two issues.
Which design pattern, if employed in the refactoring exercise, would most directly address the two issues?
A. Composite View
B. Dispatcher view
C. Service to Worker
D. DAO
正解：C
解説: (Topexam メンバーにのみ表示されます)

質問 6：
Your company is considering migrating a persistence module, originally implemented as CMP entity beans, to now use JPA.
Which two statements are true?
A. The client code that accesses the CMP entity beans does not have to change.
B. Remote clients of the CMP entity beans must start using web services to access the JPA entity classes on the server.
C. JPA cannot capture all the relationships supported by CMP entity beans.
D. The JNDI name of a JPA entity class can be customized to match that of the corresponding CMP entity bean.
E. The resulting JPA persistence module can be used on both the client and the server.
正解：A,D