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

1. The Squeaky Bean company has decided to port their web application to a new J2EE 1.4 container. While reviewing the application, a developer realizes that in multiple places within the current application, nearly duplicate code exists that finds enterprise beans. Which pattern should be used to eliminate this duplicate code?

A) Transfer Object
B) Front Controller
C) Model-View-Controller
D) Intercepting Filter
E) Business Delegate
F) Service Locator

2. 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) chain.forward(request, response);
C) request.doFilter(request, response);
D) request.forward(request, response);

3. Which interface must a session attribute implement if it needs to be notified when a web container persists a session?

A) javax.servlet.http.HttpSessionAttributeListener
B) javax.servlet.http.HttpSessionListener
C) javax.servlet.http.HttpSessionBindingListener
D) javax.servlet.http.HttpSessionActivationListener

4. 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) If the web application uses HTTPS, then the web container may use the data on the HTTPS request stream to identify the client.
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.

5. Which JSP standard action can be used to import content from a resource called foo.jsp?

A) <jsp:include file='foo.jsp' />
B) <jsp:import>foo.jsp</jsp:import>
C) <jsp:include>foo.jsp</jsp:include>
D) <jsp:import file='foo.jsp' />
E) <jsp:include page='foo.jsp' />
F) <jsp:import page='foo.jsp' />

Solutions: