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Oracle Java Enterprise Edition 5 Web Component Developer Certified Professional Sample Questions:

1. 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>
<location>/WEB-INF/jsps/error403.jsp</location>
</error-page>
B) <error-page>
<error-code>403</error-code>
<url>/WEB-INF/jsps/error403.jsp</url>
</error-page>
C) <error-page>
<status-code>403</status-code>
<location>/WEB-INF/jsps/error403.jsp</location>
</error-page>
D) <error-page>
<status-code>403</status-code>
<url>/WEB-INF/jsps/error403.jsp</url>
</error-page>

2. 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 {
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?

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

3. Which three are valid values for the body-content attribute of a tag directive in a tag file? (Choose three.)

A) tagdependent
B) dynamic
C) EL
D) JSP
E) scriptless
F) empty

4. Given the definition of MyServlet:
11.
public class MyServlet extends HttpServlet {
12.
public void service(HttpServletRequest request,
13.
HttpServletResponse response)
14.
throws ServletException, IOException {
15.
HttpSession session = request.getSession(); 16 session.setAttribute("myAttribute","myAttributeValue");
17.
session.invalidate();
18.
response.getWriter().println("value=" +
19.
session.getAttribute("myAttribute"));
20.
}
21.
}
What is the result when a request is sent to MyServlet?

A) The string "value=myAttributeValue" appears in the response stream.
B) An InvalidSessionException is thrown at runtime.
C) An IllegalStateException is thrown at runtime.
D) The string "value=null" appears in the response stream.

5. Which three are valid URL mappings to a servlet in a web deployment descriptor? (Choose three.)

A) *.do
B) MyServlet/*.jsp
C) /MyServlet/*
D) */*
E) MyServlet
F) /MyServlet

Solutions: