Oracle Oracle Certifications 1Z0-807 Questions & Answers

• Question 41:

  Which four services are guaranteed to be present in a specification compliant Java EE container?

  A. Security

  B. Persistence

  C. Naming and messaging

  D. Remote connectivity

  E. Failover

  F. Lifecycle management

  G. Multithreading handling

  H. Load balancing

  Correct Answer: ABDF

• Question 42:

  Your web page design company is designing websites for all the stores in a local mall. Your company must create a consistent "look and fool" for these sites.

  After this "look and feel- project has gone through demonstration, enhancement and approval iterations with the mall's .lions, you job is complete and the development of the actual B2C (Business to-Client) system will be handled by a different firm

  Which architecture is most appropriate for your prototype project?

  A. Two tier, web-centric

  B. Three, web-centric

  C. Three-tier, enterprise-centric

  D. Three-tier, application-centric

  Correct Answer: A

• Question 43:

  You are the operations architect for a large online retailer. During peak times, your set of monitored applications exhibits non-reproducible errors. The data center is growing at 50% per annum, while your team headcount remains constant.

  Which method would you use to implement an affective monitoring strategy?

  100% Real QandAs | 100% Real Pass

  A. Use the Visitor pattern to collect per-JVM statistics and store them centrally.

  B. Use the Strategy pattern to encapsulate collection logic for each JVM.

  C. Use the Thread Tracker to monitor the JVMs directly.

  D. Use the Observer pattern to monitor each JVM directly.

  Correct Answer: D

• Question 44:

  You are consulting with a team that has maintained several legacy database for years. They have reviewed the JPA spec and are wondering if the technology would offer benefits over this current SQL base.

  Which statement identifies a risk of adopting JPA?

  A. JPA only works with well-known data models.

  B. JPA may be able to model every table as a class.

  C. JPA could render code that requires extensive SQL tuning to perform well.

  D. JPA's query language relies on a container to manage the persistence layer.

  E. JPA doesn't provides ACID semantics.

  Correct Answer: A

• Question 45:

  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?

  A. Swing

  B. JDBC

  C. JPA

  D. CMP

  E. AWT

  Correct Answer: AB

• Question 46:

  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. Payload Extractor

  C. Asynchronous Resource Integrator

  D. Web Service Broker

  E. Service Starter

  Correct Answer: A

  100% Real QandAs | 100% Real Pass

• Question 47:

  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?

  A. The storage mechanism implemented in CommentManager must be private to CommentManager.

  B. All the accessor and mutator methods in CommentManager must have the static modifier in their declarations.

  C. The comments must be assessable directly only within CommentManager.

  D. CommentManager should be a singleton object.

  Correct Answer: AC

• Question 48:

  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?

  A. The HTML UI and native clients both use HttpSession objects.

  B. The HTML UI and native clients both use stateful session beans.

  C. The HTML UI and native clients both use stateless session beans.

  D. The HTML UI uses an HttpSession object, native clients create a session management object.

  E. The HTML UI and native clients both use singleton beans.

  Correct Answer: BD

• Question 49:

  Which two statements are true about RESTful web services?

  A. They can be both stateful and stateless.

  B. They support the use of AJAX in web applications.

  C. They are often similar than their Simple Object Access protocol (SOAP) equivalents.

  D. They are independent of the transport protocol.

  E. They support Remote Procedure Call (RPC) and message-Oriented Middleware (MOM) integration styles.

  Correct Answer: BC

• Question 50:

  Which two statements apply to unsigned applets?

  A. They can access the client file system.

  B. They can connect to third-party servers.

  C. They can connect to the originating host.

  D. They can invoke public methods of applets on a page.

  E. They can load native libraries.

  Correct Answer: CD