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Question ID 4705

Given an HttpServletRequest request:
22.    String id = request.getParameter(“jsessionid”);
23.    // insert code here
24.    String name = (String) session.getAttribute(“name”)
Which three can be placed at line 23 to retrieve an existing HttpSession object? (Choose three)
 

Option A

A.    HttpSession session = request.getSession();
 

Option B

B.    HttpSession session = request.getSession(id);
 

Option C

C.    HttpSession session = request.getSession(true);
 

Option D

D.    HttpSession session = request.getSession(false);
 

Option E

E.    HttpSession session = request.getSession(“jsessionid”);
 

Correct Answer A,C,D
Explanation


Question ID 4706

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 hasmap 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 {
12.    String sessionID = request.getParameter("sessionID");
13.    HttpSession session = getSession(sessionID);
14.    long age = // your code here
15.    response.getWriter().print(age);
16.    }
... // more code here
47. }
Which code snippet on line 14, will determine the age of the session?
 

Option A

A.    session.getMaxInactiveInterval();
 

Option B

B.    session.getLastAccessed().getTime() – session.getCreationTime().getTime();
 

Option C

C.    session.getLastAccessedTime().getTime() – session.getCreationTime().getTime();
 

Option D

D.    session.getLastAccessed() - session.getCreationTime();
 

Option E

E.    session.getMaxInactiveInterval() – session.getCreationTime();
 

Option F

F.    session.getLastAccessedTime() – session.getCreationTime();
 

Correct Answer F
Explanation

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