Oracle 1Z0-807 問題集

質問 1：
Which three web applications work best when they are designed to be server-push enabled?
A. A web chat that allows users to communicate using easily accessible web interfaces
B. An auction system that provides users with live online bidding
C. A live sporting event application, used to deliver current results during matches
D. A graphics rendering application that generates visuals in an orderly fashion
正解：A,C,D

質問 2：
A company is extending its successful social networking site to support the following channels: instant messaging (IM), email messaging and text messaging/SMS. At present, the site has scaled 400% in one year using a standard MVC Web framework. the application experiences large surges or spikes in demand and also periods of inactivity. Notification delivery to the three channels does not need to be guaranteed.
Which solutions extends the current architecture and best meets the company's requirements?
A. Send the notification inline, that is, within the normal HTTP request-response cycle.
B. Place messaging on a Java messaging Service (JMS) queue and use message-driven beans (MDBs) to create and send notifications.
C. Insert the messages into a database and use entity beans to read the messages using JDBC and send notifications.
D. Insert the messages into a database and use plain old Java Objects (POJOs) to read the messaging using JDBC and send notifications.
正解：B

質問 3：
You are the architect for a patient management system with an HTML UI. Currently, it is used by ward nurses who access the system using dockable tablet computers. The application uses the HttpSession object to store information.
In phase two of the implementation, nurses will also have access through smart phones. These phones will use a native client rather than HTML, and will access the same business logic using a Web service.
Which two are optimal methods to manage conversational state in the new version of the system?
A. The HTML UI and native clients both use singleton beans.
B. The HTML UI and native clients both use HttpSession objects.
C. The HTML UI uses anHttpSessionobject, native clients create asession managementobject.
D. The HTML UI and native clients both use stateless session beans.
E. The HTML UI and native clients both usestateful session beans.
正解：C,E

質問 4：
An online library wants to introduce a feature where an email notification is generated whenever a book becomes available for circulation. This notification must be sent to only those members who have expressed interest in that book.
Which design pattern would you use to implement this requirement?
A. Observer
B. Service Starter
C. Payload Extractor
D. Asynchronous Resource Integrator
E. Web Service Broker
正解：A

質問 5：
During a security audit, it is noted that your application is vulnerable to SQL Injection attacks.
Which two action would you perform to address this vulnerability?
A. Deploy the Internet facing nodes in a well defined demilitarized zone (DMZ) layer.
B. Configure user permissions in the deployment descriptor.
C. Use parameterized stored procedures with the principle of least privilege.
D. Configure security roles in the deployment descriptor.
E. Add a text input validation filter to check user-supplied data.
正解：B,E

質問 6：
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