Oracle 1Z0-807 Online Practice Questions and Exam Preparation

Oracle 1Z0-807 Online Questions & Answers

• Question 61:

  Which is an objective of the Strategy pattern?

  A. To provide a way to configure a class with one of many behaviors
  B. To define an object that encapsulates how a set of objects interacts
  C. To define the skeleton of an algorithm, deferring some steps to subclasses
  D. To decouple an abstraction horn its implementation so that the two can vary independently
  E. To define a family of algorithms, encapsulate each one, and make them interchangeable
  F. To allow subclasses to redefine certain steps of an algorithm without changing the algorithm's structure
  A. To provide a way to configure a class with one of many behaviors

• Question 62:

  The integration team has reported a problem in testing a few deployed MDBs. By design, each MDB listens to one of four named queues. Two producers write messages to each queue. The test issues messages of the same payload type that each producer will send, but varies the number or size of these messages to measure the messaging server's performance.

  The team has noticed that the utilization remains at the same high rate any time the test writes messages destined for the third MDB. The message server log does not reveal any failure in sending messages to this MDB. Which anticipation expresses cause for this condition?

  A. Hot Potato
  B. Leaky Abstraction
  C. Cache less Cow
  D. Golden Hammer
  A. Hot Potato

• Question 63:

  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.
  B. The HTML UI and native clients both use stateful session beans.
  D. The HTML UI uses an HttpSession object, native clients create a session management object.

• Question 64:

  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.
  C. They can connect to the originating host.
  D. They can invoke public methods of applets on a page.

• Question 65:

  You are using an open source integration framework in your project. However, key interfaces do not explicitly define several strange conditions you have repeatedly seen while testing. Which option is the name given to the anti pattern described above?

  A. Composite View
  B. Leaky Abstraction
  C. Asynchronous Interaction
  D. Golden Hammer
  B. Leaky Abstraction

• Question 66:

  Which two use cases are best suited to the RPC style of messaging using Simple Object Access Protocol (SOAP)?

  A. Processing large sized communication messages
  B. Implementing line grained services
  C. Validating custom data types
  D. Implementing asynchronous web services
  E. Executing long running multi-part processes
  B. Implementing line grained services
  C. Validating custom data types

• Question 67:

  Which two security threats are negated by encrypting network transactions with Transport Layer Security (TLS)?

  A. SQL injection
  B. Session hijacking
  C. Man in the middle
  D. Cross-site scripting
  E. Denial of service
  B. Session hijacking
  C. Man in the middle

• Question 68:

  Which two statements are true about security strategies at the message level?

  A. Messages are secured during transport and after arrival at their destination
  B. Each portion of a compound message is secured.
  C. SSL is required to ensure authenticity, integrity, and confidentiality.
  D. Message attachments are secured without the need for a dedicated API.
  E. Security is dependent on the application environment or the transport protocol.
  A. Messages are secured during transport and after arrival at their destination
  D. Message attachments are secured without the need for a dedicated API.

• Question 69:

  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?

  A. Modify the program to implement multi threading and an event-driven design.
  B. Add servers to distribute the load.
  C. Upgrade the application server and the operating system.
  D. Define a plan for isolating the bottleneck, and define indicators that will measure performance under a test load.
  D. Define a plan for isolating the bottleneck, and define indicators that will measure performance under a test load.

• Question 70:

  StockTeller is a Java-based application designed to retrieve the current market for a portfolio of publicly listed stocks. You have been tasked to design a bolt on module for StockTeller called EBroker, a Java E- based online application that needs to asynchronously communicate with StockTeller to retrieve market prices for securities in a secure manner.

  Which web service technology would you choose to integrate StockTeller into the EBroker application?

  A. JAX-WS using HTTP
  B. JAX-WS using HTTPS
  C. JAX-RPC using HTTP
  D. JAX-RS using HTTPS
  B. JAX-WS using HTTPS