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SUN 310-083 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Deployment Descriptor and Configuration | - web.xml configuration - Servlet and filter mapping - Context initialization parameters |
| Servlet Technology | - Session management - Filters and listeners - Request and response handling - Servlet lifecycle and API |
| JavaServer Pages Standard Tag Library (JSTL) | - Core tags - Formatting and functions libraries |
| Web Application Design and Architecture | - MVC design pattern - Request dispatching - Security considerations |
| JavaServer Pages (JSP) | - Expression Language (EL) - JSP lifecycle - JSP standard actions - Custom tags and tag libraries |
SUN Sun Certified Web Component Developer for J2EE 5 Sample Questions:
As a convenience feature, your web pages include an Ajax request every five minutes to a special servlet that monitors the age of the user's session. The client-side JavaScript that handles the Ajax callback displays a message on the screen as the session ages. The Ajax call does NOT pass any cookies, but it passes the session ID in a request parameter called sessionID. In addition, assume that your webapp keeps a hashmap of session objects by the ID. Here is a partial implementation of this servlet:
10. public class SessionAgeServlet extends HttpServlet {
11. public void service(HttpServletRequest request, HttpServletResponse) throws
IOException {
1 2. String sessionID = request.getParameter("sessionID");
1 3. HttpSession session = getSession(sessionID);
1 4. long age = // your code here
1 5. response.getWriter().print(age);
16. } ... // more code here
47. }
Which code snippet on line 14, will determine the age of the session?
- A. session.getLastAccessed().getTime() - session.getCreationTime().getTime();
- B. session.getLastAccessedTime() - session.getCreationTime();
- C. session.getLastAccessed() - session.getCreationTime();
- D. session.getMaxInactiveInterval() - session.getCreationTime();
- E. session.getLastAccessedTime().getTime() - session.getCreationTime().getTime();
- F. session.getMaxInactiveInterval();
Which defines the welcome files in a web application deployment descriptor?
- A. <welcome>
< welcome-file>welcome.jsp</welcome-file>
< /welcome>
< welcome>
< welcome-file>index.html</welcome-file>
< /welcome> - B. <welcome>
< welcome-file>
< welcome-name>Welcome</welcome-name>
< location>welcome.jsp</location>
< /welcome-file>
< welcome-file>
< welcome-name>Index</welcome-name>
< location>index.html</location>
< /welcome-file>
< /welcome> - C. <welcome>
< welcome-file>/welcome.jsp</welcome-file>
< /welcome>
< welcome>
< welcome-file>/index.html</welcome-file>
< /welcome> - D. <welcome-file-list>
< welcome-file>welcome.jsp</welcome-file>
< welcome-file>index.html</welcome-file>
< /welcome-file-list> - E. <welcome-file-list>
< welcome-file>/welcome.jsp</welcome-file>
< welcome-file>/index.html</welcome-file>
< /welcome-file-list>
The Squeaky Beans Inc. shopping application was initially developed for a non-distributed environment. The company recently purchased the Acme Application Server, which supports distributed HttpSession objects. When deploying the application to the server, the deployer marks it as distributable in the web application deployment descriptor to take advantage of this feature.
Given this scenario, which two must be true? (Choose two.)
- A. The J2EE web container must use the native JVM Serialization mechanism for distributing HttpSession objects.
- B. The J2EE web container must support migration of objects that implement Serializable.
- C. As per the specification, the J2EE web container ensures that distributed HttpSession objects will be stored in a database.
- D. Storing references to Enterprise JavaBeans components in the HttpSession object might
NOT be supported by J2EE web containers.
Given this fragment in a servlet:
2 3. if(req.isUserInRole("Admin")) {
2 4. // do stuff
2 5. }
And the following fragment from the related Java EE deployment descriptor:
8 12. <security-role-ref>
8 13. <role-name>Admin</role-name>
8 14. <role-link>Administrator</role-link>
8 15. </security-role-ref>
9 00. <security-role>
9 01. <role-name>Admin</role-name>
9 02. <role-name>Administrator</role-name>
9 03. </security-role>
What is the result?
- A. If line 24 executes, the user's role will be Administrator.
- B. If line 24 executes the user's role will NOT be predictable.
- C. Line 24 can never be reached.
- D. The deployment descriptor is NOT valid.
- E. If line 24 executes, the user's role will be Admin.
A developer is designing a multi-tier web application and discovers a need to log each incoming client request. Which two patterns, taken independently, provide a solution for this problem? (Choose two.)
- A. Business Delegate
- B. Transfer Object
- C. Front Controller
- D. Service Locator
- E. Intercepting Filter
- F. Model-View-Controller
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