1Z0-807 Online Practice Questions and Answers

A company manufactures widgets for sale to distribution. Distributors call this company when they want to order more widgets. The company wants the distributors to send orders using XML documents over the Internet to reduce the number of data entry personnel needed. It has no control over the distributors technologies. The company does not want the Orders to impact the performance of other users. You have been assigned the task of designing a new API.

Which method do you use?

A. Design the API as a Java Message Service (JMS) queue.

B. Design the API as an Remote Method Invocation (RMI) interface.

C. Design the API as a synchronous web service.

D. Design the API as an asynchronous web service.

A company must honor a service-level agreement (SLA) for its application, which states all database requests must execute within three seconds.

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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.

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.

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

You are consulting with a team that has maintained several legacy database for years. They have reviewed the JPA spec and are wondering if the technology would offer benefits over this current SQL base.

Which statement identifies a risk of adopting JPA?

A. JPA only works with well-known data models.

B. JPA may be able to model every table as a class.

C. JPA could render code that requires extensive SQL tuning to perform well.

D. JPA's query language relies on a container to manage the persistence layer.

E. JPA doesn't provides ACID semantics.

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

A. Low cohesion

B. Loose coupling

C. Session handling

D. Well defined contracts

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.

Which two types of applications benefit from using JavaServer Faces (JSF)?

A. An application with a customizable UI skin

B. An application that implements access control on each action based on user role.

C. An application in which type conversion of the values of UI components is implemented only in Java classes.

D. An application that sets specific database validation listeners on a UI component

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

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