Oracle 1Z0-807 Online Practice Questions and Exam Preparation

Oracle 1Z0-807 Online Questions & Answers

• Question 51:

  While analyzing an existing web application, you observe the following issues in the source code: Duplicate control code is scattered throughout various view.

  

  Business and presentation logic are 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. Service to Worker
  B. Dispatcher view
  C. DAO
  D. Composite View
  A. Service to Worker

• Question 52:

  Your company is considering migrating a persistence module, originally implemented as CMP entity beans, to now use JPA. Which two statements are true?

  A. Each CMP entity bean can be mapped to a single JPA entity class.
  B. The client code that accesses the CMP entity beans does not have to change.
  C. IPA cannot capture all the kinds of relationships supported by CMP entity beans.
  D. The resulting IPA persistence module can be used on both the client and the server.
  E. The JNDI name of a JPA entity class can be customized to match that of the corresponding CMP entity bean.
  F. Remote clients of the CMP entity beans must start using web services to access the JPA entity classes on the server.
  A. Each CMP entity bean can be mapped to a single JPA entity class.
  D. The resulting IPA persistence module can be used on both the client and the server.

• Question 53:

  You are conducting a security audit for a web application that uses URL rewriting. The application does not allow for user-generated content and is accessible only via secured VPN. Which two security threats would you prioritize in your audit?

  A. SQL injection
  B. Cross-site scripting
  C. Parameter-site manipulating
  D. Session hijacking
  E. Denial-of-service attacks
  C. Parameter-site manipulating
  D. Session hijacking

• Question 54:

  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?

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

• Question 55:

  A manufacturing company has a large investment in a legacy Inventory Management System (IMS) developed with third-party technologies. You have been asked to design a Java EE application that interacts with it.

  You would like to ensure the following:

  Minimal application code is required to parse the communication messages.

  

  Communication is asynchronous and stateless.

  

  Performance import of the existing system is minimal.

  

  Which two technologies combined would meet these requirements?

  A. XML
  B. JSON
  C. RMI
  D. JAX-RS
  E. JAX-WS
  B. JSON
  D. JAX-RS

• Question 56:

  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
  A. Security
  B. Persistence
  D. Remote connectivity
  F. Lifecycle management

• Question 57:

  You are asked to propose a software deployment strategy that will reduce a client will also make deploying and testing their software stack more efficient. Which element would you include in your proposal?

  A. Vertically scalable platform
  B. Horizontally scalable platform
  C. Virtualized platform
  D. Standard unit testing software
  C. Virtualized platform

• Question 58:

  You are the architect at ACME, a large a large global retailer of festival and holiday accessories. ACME wants to launch a new shopping portal for the holiday shopping session, allowing two months from project inception to going live. The

  portal must contain in-house and third-party stock to attack customers.

  Fast response times are also critical so users remain engaged and sticky to the portal.

  What would you recommend to the ACME project team to deliver this project?

  A. Access all third party content using JSONP to dynamically load it from the browser.
  B. Access as much content with bulk-loading as possible; use JSONP to access the remainder.
  C. Access all content regardless of source using the HTML 5 XML parsing capabilities of the browser
  D. Access all third party content using JSON to dynamically load it from the browser.
  A. Access all third party content using JSONP to dynamically load it from the browser.

• Question 59:

  Which two are primary concerns for a service-oriented architecture (SOA)?

  A. Low cohesion
  B. Loose coupling
  C. Session handling
  D. Well defined contracts
  B. Loose coupling
  D. Well defined contracts

• Question 60:

  YourDocs is an application that retrieves PDF documents of selected topics from both trusted and untrusted websites. It has been developed using a non-Java technology. You are designing your Mlearn, a mobile-based e-learning application, which will be implemented in Java. You plan to integrate YourDocs with your application.

  Which web service technology would you choose to Integrate YourDocs into the YourMLearn application?

  A. JAX-WS
  B. JAX-WS with REST
  C. JAX-RPC
  D. JAX-RS
  D. JAX-RS