Oracle Java Enterprise Edition 6 Enterprise Architect Set 1

A company is extending is 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 company must honor a service-level agreement (SLA) for its application, which states all database requests must execute within three seconds.
Users complain that some requests take longer than five seconds to complete. You have been contracted to fix the problem.
Which course of action do you recommend?

Your CMC wants to move several web based search applications to an AJAX model, hoping to improve user engagement with a browser experience that feels
smaller and more responsive.
Which identifies a drawback to consider when adopting an AJAX model to improve user experience?

A company has been soiling a desktop based billing application that has Character User Interface (CUI) application developed by using Java. The company would like to release the next version of this application with the following features: a GUI with a pluggable look- and-feel capability and the flexibility to support multiple database vendors. Which two technologies would you use in the new version?

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?

You are designing a new subsystem to store and scratch for user commands in a fashion company's website. On class, CommentManager, is responsible for accessing comment data and providing read-only access to other objects in the subsystem. Which two implementation details are necessary for the Cementmanager class?

You are the architect for a patient management system with an HTMLUI. 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?

Which two statements are true about RESTful web services?

Which two actions limit the consequences of a network based attack?

You are implementing an online music that will store and play a user's collection of songs. You want users to rate their songs and view the top songs from friends.
All queries must complete in four seconds or less.
Which approach would meet the response time requirement with minimal overhead?