1Z0-807 Online Practice Questions and Answers

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.

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 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.

100% Real QandAs | 100% Real Pass

Which two technologies combined would meet these requirements?

A. XML

B. JSON

C. RMI

D. JAX-RS

E. JAX-WS

Which two statements are true about the timer service of a business component container?

A. Timed notifications for all types of session beans can be scheduled by using this service.

B. When the server is shut down, the timer is persisted automatically and becomes active again when the server is restarted.

C. Each instance of message driven beans has unique timers.

D. When stateful session bean instance is removed, the container detaches the timers associated with the instance and allocates them to the new instance.

E. When a transaction is rolled hark, the timer creation within the transaction is also rolled back.

Blue Berry Corporation, one of the biggest fruit traders in Canada, has the biggest competitor, Red Cherry

100% Real QandAs | 100% Real Pass Corporation. Blue Berry uses a web application that is developed by using java technologies, whereas Red Cherry's web application uses non-Java technologies. Blue Berry plans to share business sensitive, transactional data between the two systems by integrating them in a loosely coupled manner.

Which technology should be used to this?

A. JMS

B. JCA

C. XML over HTTPS

D. RMI over IIOP

E. JBI

A business application that runs in an Enterprise JavaBeans (EJB) container must communicate with a transactional third-party service. The communication technology must allow changing service providers without changing the application's business model.

Which technology would meet these requirements?

A. Java Message Service

B. Remote Method Invocation

C. Simple Object Access Protocol

D. Java Connector Architecture

E. Java Business Integration

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.

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 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. 100% Real QandAs | 100% Real Pass

C. The web pages cannot be previewed accurately with a generic WYSIWYG HIML editor.

D. The web pages must be converted into Face lets.

Which three actions represent best practices when implementing an exception handling strategy for an application?

A. Create a custom checked exception if an alternative action can be taken to resolve the exception.

B. Create a custom unchecked exception if the action to resolve the exception cannot be defined.

C. Always log the specific exception before re-throwing a wrapped exception.

D. Always throw exceptions in methods that are designed for exception handling.

E. Always include information specific to the error when logging an exception.