Given a Filter class definition with this method:
21.
public void doFilter(ServletRequest request,
22.
ServletResponse response,
23.
FilterChain chain)
24.
throws ServletException, IOException {
25.
// insert code here
26.
}
Which should you insert at line 25 to properly invoke the next filter in the chain, or the target servlet if there are no more filters?

• A. chain.doFilter(request, response);
• B. request.forward(request, response);
• C. request.doFilter(request, response);
• D. chain.forward(request, response);

Click the Exhibit button.
The Appliance class is a Singleton that loads a set of properties into a Map from an external data source. Assume:
An instance of the Appliance class exists in the application-scoped attribute, appl The appliance object includes the name property that maps to the value Cobia The request-scoped attribute, prop, has the value name.
Which two EL code snippets will display the string Cobia? (Choose two.)

• A. ${appl.getProperties().get(prop)}
• B. ${appl.getProperties().get('name')}
• C. ${appl.properties.name}
• D. ${appl.properties[name]}
• E. ${appl.properties[prop]}
• F. ${appl.properties.prop}

You have built a web application with tight security. Several directories of your webapp are used for internal purposes and you have overridden the default servlet to send an HTTP 403 status code for any request that maps to one of these directories. During testing, the Quality Assurance director decided that they did NOT like seeing the bare response page generated by Firefox and Internet Explorer. The director recommended that the webapp should return a more user-friendly web page that has the same look-and-feel as the webapp plus links to the webapp's search engine. You have created this JSP page in the /WEB-INF/jsps/error403.jsp file. You do NOT want to alter the complex logic of the default servlet. How can you declare that the web container must send this JSP page whenever a 403 status is generated?

• A. <error-page>
  <error-code>403</error-code>
  <url>/WEB-INF/jsps/error403.jsp</url>
  </error-page>
• B. <error-page>
  <status-code>403</status-code>
  <location>/WEB-INF/jsps/error403.jsp</location>
  </error-page>
• C. <error-page>
  <status-code>403</status-code>
  <url>/WEB-INF/jsps/error403.jsp</url>
  </error-page>
• D. <error-page>
  <error-code>403</error-code>
  <location>/WEB-INF/jsps/error403.jsp</location>
  </error-page>

A web application uses the HttpSession mechanism to determine if a user is "logged in." When a user supplies a valid user name and password, an HttpSession is created for that user.
The user has access to the application for only 15 minutes after logging in. The code must determine how long the user has been logged in, and if this time is greater than 15 minutes, must destroy the HttpSession.
Which method in HttpSession is used to accomplish this?

• A. getLastAccessedTime
• B. getMaxInactiveInterval
• C. invalidateAfter
• D. getCreationTime

Which two prevent a servlet from handling requests? (Choose two.)

• A. The servlet's init method sets the ServletResponse's content length to 0.
• B. The servlet's init method sets the ServletResponse's content type to null.
• C. The servlet's init method throws a ServletException.
• D. The servlet's init method does NOT return within a time period defined by the servlet container.
• E. The servlet's init method returns a non-zero status.