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最新的 SCWCD 310-083 免費考試真題:

1. A developer is designing a web application that makes many fine-grained remote data requests for each client request. During testing, the developer discovers that the volume of remote requests significantly degrades performance of the application. Which design pattern provides a solution for this problem?

A) Dispatcher View
B) Transfer Object
C) Business Delegate
D) Flyweight
E) Model-View-Controller
F) Service Locator

2. A developer for the company web site has been told that users may turn off cookie support in their browsers. What must the developer do to ensure that these customers can still use the web application?

A) The developer can ignore this issue. Web containers are required to support automatic
URL rewriting when cookies are not supported.
B) The developer must provide an alternate mechanism for managing sessions and abandon the HttpSession mechanism entirely.
C) The developer must add the string id=<sessionid> to the end of every URL to ensure that the conversation with the browser can continue.
D) The developer must ensure that every URL is properly encoded using the appropriate
URL rewriting APIs.

3. Which two directives are applicable only to tag files? (Choose two.)

A) include
B) tag
C) variable
D) taglib
E) page

4. DRAG DROP
Click the Task button.
Place the servlet name onto every request URL, relative to the web application context root, that will invoke that servlet. Every request URL must be filled.

5. 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.getLastAccessedTime() - session.getCreationTime();
B) session.getLastAccessed().getTime() - session.getCreationTime().getTime();
C) session.getLastAccessed() - session.getCreationTime();
D) session.getLastAccessedTime().getTime() - session.getCreationTime().getTime();
E) session.getMaxInactiveInterval() - session.getCreationTime();
F) session.getMaxInactiveInterval();

問題與答案：