Free 1Z0-807 Exam Dumps Preview

You are contracted to improve the performance of an application.

While analyzing the application, you observe the following issues:

Tight coupling between client and business objects
Too many remote method Invocations between client and server

Which design pattern is best suited to improving performance?

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?

You are the architect of a web application that uses javaServer Faces (JSF) as a presentation tier for business processes coded as stateless session beans. When you add new code to the stateless session

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beans to address new accounting requirements, without changing the interface, you discover that the new business processes are being ignored by some of the JSF components.

What might be the cause of this problem?

ABC Travel offers a night reservation service, exposed as a web service. XYZ Stays offers a hotel reservation service, also exposed as a web service. ABC and XYZ will not change their web service. A startup company has contacted you for advice about designing a new service that combines flight and hotel reservations, which they will offer as a web service.

The startup company plans to provide their service by implementing a portable Java EE solution that aggregates the two services offered by ABC Travel and XYZ Stays, a combined reservation succeeded.

Only if both the flight reservation and the hotel reservation succeed

Which is the most effective way to meet the business requirement?

Your company has decided to expose a set of business operations through an API so that clients can access them remotely. These operations, which are modeled as methods on a stateless session bean component, act as building blocks for complex state-changing activities that need to possess atomicity,, consistency, isolation and durability (ACID) semantics.

Select the best technology to implement the API.

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?

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?

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?

Your consulting company has been asked to enhance an existing application. The current application is a

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two-tier system in which all the business logic is located in thick clients. You are considering a solution that would involve moving the business logic into the server's database In the form of stored procedures.

Which statement is an expected outcome of your proposed solution?

Which option describes the design relationship between session beans and entity beans?

Your application uses web services extensively and frequently to distribute large XML objects over HTTP.
In addition, the application has been set particularly demanding performance and scalability service level agreements (SLAs).

Which java API is best suited for your application?

Which two statements describe the contact between an Enterprise JavaBeans (EJB) container and the EJBs that it hosts?

What are two consequences of using the Composite View pattern?

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