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- Exam Code: 1Z0-858
- Exam Name: Java Enterprise Edition 5 Web Component Developer Certified Professional Exam
- Q & A: 276 Questions and Answers
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Oracle 1Z0-858 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Web Application Security | - Authentication and authorization - Declarative security |
| Servlet Technology | - Session management - Servlet lifecycle and architecture - Request and response handling - Filters and listeners |
| Web Application Deployment | - Application server configuration - Packaging and deployment of WAR files |
| Web Application Design and Architecture | - Deployment descriptors (web.xml) - Model-View-Controller (MVC) pattern |
| JavaServer Pages (JSP) | - JSP syntax and lifecycle - Custom tags and JSTL - Expression Language (EL) |
Oracle Java Enterprise Edition 5 Web Component Developer Certified Professional Sample Questions:
Question #1
Which three are true about servlet filters? (Choose three.)
- A. A filter must implement the destroy method.
- B. A filter that is part of a filter chain passes control to the next filter in the chain by invoking the FilterChain.forward method.
- C. For each <filter> element in the web application deployment descriptor, multiple instances of a filter may be created by the web container.
- D. A filter must implement the doFilter method.
- E. A servlet that is to have a filter applied to it must implement the javax.servlet.FilterChain interface.
- F. A servlet may have multiple filters associated with it.
Answer: A,D,F
Question #2
You are developing several tag libraries that will be sold for development of third-party web applications. You are about to publish the first three libraries as JAR files: container-tags.jar, advanced-html-form-tags.jar, and basic-html-form-tags.jar. Which two techniques are appropriate for packaging the TLD files for these tag libraries? (Choose two.)
- A. The TLD must be located within the META-INF directory of the JAR file.
- B. The TLD must be located within the WEB-INF directory of the JAR file.
- C. The TLD must be located within a subdirectory of META-INF directory of the JAR file.
- D. The TLD must be located within a subdirectory of WEB-INF directory of the JAR file.
- E. The TLD must be located within a subdirectory of META-INF/tld/ directory of the JAR file.
- F. The TLD must be located within the META-INF/tld/ directory of the JAR file.
Answer: A,C
Question #3
A developer is designing the presentation tier for a web application which requires a centralized request handling to complete common processing required by each request. Which design pattern provides a solution to this problem?
- A. Intercepting Filter
- B. Front Controller
- C. Data Access Object
- D. Service Activator
- E. Business Delegate
- F. Remote Proxy
Answer: B
Question #4
Which two are characteristics of the Intercepting Filter pattern? (Choose two.)
- A. It reduces coupling between presentation-tier clients and underlying business services.
- B. It can be added and removed unobtrusively, without requiring changes to existing code.
- C. It provides centralized request handling for incoming requests.
- D. It forces resource authentication to be distributed across web components.
- E. It allows preprocessing and postprocessing on the incoming requests and outgoing responses.
Answer: B,E
Question #5
A developer is designing a multi-tier web application and discovers a need to hide the details of establishing and maintaining remote communications from the client. In addition, because the business and resource tiers are distributed, the application needs to minimize the inter-tier network traffic related to servicing client requests. Which design patterns, working together, address these issues?
- A. Model-View-Controller and Intercepting Filter
- B. Front Controller and Transfer Object
- C. Business Delegate and Transfer Object
- D. Business Delegate and Intercepting Filter
- E. Front Controller and Service Locator
Answer: C
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