Oracle 1Z0-807 Online Practice Questions and Exam Preparation

Oracle 1Z0-807 Online Questions & Answers

• Question 31:

  Upper management has announced a change in a company's primary hardware supplier for the next year, the timing of this change coincides with key purchases that line of business department has to make in support of its Java EE

  application upgrade/redesign project.

  You are asked to help outline a strategy to preserve the project timeline and keep hardware training costs contained.

  Which recommendation will you make?

  A. Add new hardware to create a heterogeneous environment.
  B. Request another year of sales and support with the existing vendor.
  C. Request more time to consider the total cost of change to your project and to modify your budget.
  D. Use new hardware on the web tier and redeploy existing hardware to the other tiers.
  A. Add new hardware to create a heterogeneous environment.

• Question 32:

  Which three actions restrict the ability of a web application to scale in response to load as additional computing resources are made available to it?

  A. Implementing the Singleton pattern in the web tier
  B. Implementing core business logic in the web tier
  C. Implementing core business logic using stateless session beans
  D. Storing users' session state in a database
  E. Maintaining users' session state by using stateful session beans
  A. Implementing the Singleton pattern in the web tier
  B. Implementing core business logic in the web tier
  E. Maintaining users' session state by using stateful session beans

• Question 33:

  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.
  B. They support the use of AJAX in web applications.
  C. They are often similar than their Simple Object Access protocol (SOAP) equivalents.

• Question 34:

  You are the architect of a JEE-based product that customers can configure to meet their own security requirements. You want to enforce basic without sacrificing customers ability to customize the product. Which is the best method to support both requirements?

  A. Define base roles and users declaratively
  B. Define base roles and users programmatically
  C. Build a custom security service to handle authorization
  D. Customize the JRE sandbox model by using local variables
  C. Build a custom security service to handle authorization

• Question 35:

  You have been tasked with improving the availability of an existing three tier application.

  What is your first stop in evaluating what changes should be made to the architecture to achieve the goal?

  A. Monitor network traffic between tiers.
  B. Separate presentation from business logic.
  C. Identify and document all single points of failure.
  D. Cluster the presentation tier without session replication.
  C. Identify and document all single points of failure.

• Question 36:

  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?

  A. Java class that uses JDBC with embedded SQL
  B. Java class that uses an optimized stored procedure
  C. JPA entity class with a lazy fetching strategy
  D. JPA entity class with an eager fetching strategy
  B. Java class that uses an optimized stored procedure

• Question 37:

  Which two features are supported by the Java Authentication and Authorization Service (JAAS) API?

  A. Single sign on
  B. Secure network connections
  C. Configurable access control policies
  D. Web services security
  E. Message encryption and key generation
  A. Single sign on
  C. Configurable access control policies

• Question 38:

  You are designing a bank application in which automated email reminders are sent to customers every 24 hours, starting from five days prior to a payment due date until the payment is made? Which type of beans most closely match the implementation needs for this requirement?

  A. Stateful session bean
  B. Stateless session bean
  C. Managed bean
  D. Message-driven bean
  D. Message-driven bean

• Question 39:

  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
  A. Two tier, web-centric

• Question 40:

  A company that sells avatar skins tor virtual reality environments has a static website for advertising their wares. The website was built using What You See Is What You Get (WYSIWYG) html editor and also contains a lot of JavaScript. The company now wants to add server side processing capabilities developing a shopping application, the company is considering using JavaServer Faces (JSF)

  Which statement is true?

  A. The JavaScrip code has to be rewritten to conform to JSF standards.
  B. JSF tags cannot be integrated into the HTML generated by WYSIWYG editors.
  C. The web pages cannot be previewed accurately with a generic WYSIWYG HIML editor.
  D. The web pages must be converted into Face lets.
  C. The web pages cannot be previewed accurately with a generic WYSIWYG HIML editor.