SUN 310-083 : Sun Certified Web Component Developer for J2EE 5

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SUN Sun Certified Web Component Developer for J2EE 5 Sample Questions:

1. Which statement is true about web container session management?

A) Access to session-scoped attributes is guaranteed to be thread-safe by the web container.
B) If the web application uses HTTPS, then the web container may use the data on the
HTTPS request stream to identify the client.
C) To activate URL rewriting, the developer must use the
HttpServletResponse.setURLRewriting method.
D) The JSESSIONID cookie is stored permanently on the client so that a user may return to the web application and the web container will rejoin that session.

2. DRAG DROP
Click the Task button.
Given a servlet mapped to /control, place the correct URI segment returned as a String on the corresponding HttpServletRequest method call for the URI:
/myapp/control/processorder.

3. Given a portion of a valid Java EE web application's directory structure:
MyApp
|
|-- Directory1
| |-- File1.html
|
|-- META-INF
| |-- File2.html
|
|-- WEB-INF
|-- File3.html
You want to know whether File1.html, File2.html, and/or File3.html is protected from direct access by your web client's browsers.
What statement is true?

A) Only File1.html and File2.html are directly accessible.
B) Only File1.html is directly accessible.
C) Only File2.html and File3.html are directly accessible.
D) Only File2.html is directly accessible.
E) All three files are directly accessible.
F) Only File3.html is directly accessible.
G) Only File1.html and File3.html are directly accessible.

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

5. You are building a web application with a scheduling component. On the JSP, you need to show the current date, the date of the previous week, and the date of the next week. To help you present this information, you have created the following EL functions in the 'd' namespace:
name: curDate; signature: java.util.Date currentDate()
name: addWeek; signature: java.util.Date addWeek(java.util.Date, int)
name: dateString; signature: java.util.String getDateString(java.util.Date)
Which EL code snippet will generate the string for the previous week?

A) ${d:dateString(d:addWeek(d:curDate(), -1))}
B) ${d:dateString(addWeek(curDate(), -1))}
C) ${d:dateString[d:addWeek[d:curDate[], -1]]}
D) ${d:dateString[addWeek[curDate[], -1]]}

Solutions: