1Z0-807 Online Practice Questions and Answers

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

100% Real QandAs | 100% Real Pass

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?

A. It will improve the scalability of the system.

B. It will improve the manageability of the system.

C. It will recline the amount of traffic on the network.

D. It will, in effect, turn the application into a three-tier system.

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 has been soiling a desktop based billing application that has Character User Interface (CUI) application developed by using Java. The company would like to release the next version of this application with the following features: a GUI with a pluggable look- and-feel capability and the flexibility to support multiple database vendors.

Which two technologies would you use in the new version?

A. Swing

B. JDBC

C. JPA

D. CMP

E. AWT

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?

A. The storage mechanism implemented in CommentManager must be private to CommentManager.

B. All the accessor and mutator methods in CommentManager must have the static modifier in their declarations.

C. The comments must be assessable directly only within CommentManager.

D. CommentManager should be a singleton object.

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.

Your company uses a payroll application that was developed using Java technologies. The company has acquired another company and plans to integrate its payroll process in existing application. You have been asked to implement this integration. You observe that the business logic adopted to calculate the payroll is different in both companies.

Which design pattern would be most appropriate to use in this integration?

A. Strategy

B. Payload Extractor

C. Fly Weight

D. Composite

E. Service Locator

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

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

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 provides a marketplace for industrial chemicals. You are required to offer accurate pricing and quantities to all marketplace users.

Marketplace users are globally distributed.

What is the most appropriate technology to use to satisfy this requirement?

A. Server-side distribution using JAX-WS

B. Client-side polling using JAX-RPC

C. Web services using REST

D. An enterprise messaging system

A company provides call center support for corporations world-wide. Each agent in the call center can be assigned to multiple call center customers. All the company's customers use Windows based user interfaces and it has Just signed a new customer that uses a Java EE back end and wants a rich interface.

The company is developing a user interface for the new customer with the following requirements: Customer service representatives (CSRs) must be able to work with minimal training on the application.

CSRs must be able to switch between call center systems quickly.

Screens must have a windows look and feel.

2000 agents spread across four locations must be able to use the system.

Which recommendation would you make to this company about the user interface (UI)?

A. Write the UI using JSP and JSTL.

B. Write the UI using JSPs with embedded script lets.

C. Write the UI using AJAX, Accessing servlets directly.

D. Write the UI using Java Swing and describe using JNLP.

Which two measures are most effective in protecting websites from cross site scripting (XSS) attacks?

A. Escape "<" and ">" parameters that displayed or evaluated by the JavaScript interpreter.

B. URL-encode "<" and ">"parameters so they will never be evaluated by the JavaScript Interpreter.

C. Ensure that the session cookie is sent only on UTTPS connections.

D. Treat all user-supplied input as unsafe, and white list known good characters

E. Execute all user-supplied scripts in a server-side sandbox.

Which two are objectives of the Abstract Factory pattern?

A. To create whole-part hierarchies

B. To create families of related objects

C. To enforce dependencies between concrete classes

D. To specify the types of objects to create by using a sample instance

E. To separate the construction of a complex object from its representation 100% Real QandAs | 100% Real Pass

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

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