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. To activate URL rewriting, the developer must use the
  HttpServletResponse.setURLRewriting method.
• C. 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.
• D. If the web application uses HTTPS, then the web container may use the data on the
  HTTPS request stream to identify the client.

Your web site has many user-customizable features, for example font and color preferences on web pages. Your IT department has already built a subsystem for user preferences using Java SE's lang.util.prefs package APIs and you have been ordered to reuse this subsystem in your web application. You need to create an event listener that stores the user's Preference object when an HTTP session is created. Also, note that user identification information is stored in an HTTP cookie.
Which partial listener class can accomplish this goal?

• A. public class UserPrefLoader implements HttpSessionListener {
  public void sessionInitialized(HttpSessionEvent se) {
  MyPrefsFactory myFactory = (MyPrefsFactory)
  se.getServletContext().getAttribute("myPrefsFactory");
  User user = getUserFromCookie(se);
  myFactory.setThreadLocalUser(user);
  Preferences userPrefs = myFactory.userRoot();
  se.getHttpSession().setAttribute("prefs", userPrefs);
  }
  // more code here
  }
• B. public class UserPrefLoader implements HttpSessionListener {
  public void sessionCreated(HttpSessionEvent se) {
  MyPrefsFactory myFactory = (MyPrefsFactory)
  se.getServletContext().getAttribute("myPrefsFactory");
  User user = getUserFromCookie(se);
  myFactory.setThreadLocalUser(user);
  Preferences userPrefs = myFactory.userRoot();
  se.getSession().setAttribute("prefs", userPrefs);
  }
  // more code here
  }
• C. public class UserPrefLoader implements SessionListener {
  public void sessionCreated(SessionEvent se) {
  MyPrefsFactory myFactory = (MyPrefsFactory)
  se.getContext().getAttribute("myPrefsFactory");
  User user = getUserFromCookie(se);
  myFactory.setThreadLocalUser(user);
  Preferences userPrefs = myFactory.userRoot();
  se.getSession().addAttribute("prefs", userPrefs);
  }
  // more code here
  }
• D. public class UserPrefLoader implements SessionListener {
  public void sessionInitialized(SessionEvent se) {
  MyPrefsFactory myFactory = (MyPrefsFactory)
  se.getServletContext().getAttribute("myPrefsFactory");
  User user = getUserFromCookie(se);
  myFactory.setThreadLocalUser(user);
  Preferences userPrefs = myFactory.userRoot();
  se.getSession().addAttribute("prefs", userPrefs);
  }
  // more code here
  }

You have built your own light-weight templating mechanism. Your servlets, which handle each request, dispatch the request to one of a small set of template JSP pages. Each template JSP controls the layout of the view by inserting the header, body, and footer elements into specific locations within the template page. The URLs for these three elements are stored in request-scoped variables called, headerURL, bodyURL, and footerURL, respectively. These attribute names are never used for other purposes. Which
JSP code snippet should be used in the template JSP to insert the JSP content for the body of the page?

• A. <jsp:insert page='${bodyURL}' />
• B. <jsp:include file='${bodyURL}' />
• C. <jsp:include page='<%= bodyURL %>' />
• D. <jsp:include page='${bodyURL}' />
• E. <jsp:insert page='<%= bodyURL %>' />
• F. <jsp:insert file='${bodyURL}' />

DRAG DROP
Click the Task button.
Place the XML elements in the web application deployment descriptor solution to configure a servlet context event listener named com.example.MyListener.