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SUN Sun Certified Web Component Developer for J2EE 5 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
4 03 status is generated?

A) <error-page>
< status-code>403</status-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>
< error-code>403</error-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>

2. Squeaky Beans Inc. hired an outside consultant to develop their web application. To finish the job quickly, the consultant created several dozen JSP pages that directly communicate with the database. The Squeaky business team has since purchased a set of business objects to model their system, and the Squeaky developer charged with maintaining the web application must now refactor all the JSPs to work with the new system. Which pattern can the developer use to solve this problem?

A) Business Delegate
B) Intercepting Filter
C) Service Locator
D) Transfer Object

3. You want to create a filter for your web application and your filter will implement javax.servlet.Filter.
Which two statements are true? (Choose two.)

A) The method that your filter invokes on the object it received that implements javax.servlet.FilterChain can invoke either another filter or a servlet.
B) When your filter chains to the next filter, it should pass the same arguments it received in its doFilter method.
C) Your filter class must implement a doFilter method that takes, among other things, an
HTTPServletRequest object and an HTTPServletResponse object.
D) Your filter class must also implement javax.servlet.FilterChain.
E) Your filter class must implement an init method and a destroy method.

4. Given:
1 0. public void service(ServletRequest request,
1 1. ServletResponse response) {
1 2. ServletInputStream sis =
1 3. // insert code here
1 4. }
Which retrieves the binary input stream on line 13?

A) request.getWriter();
B) request.getInputStream();
C) request.getResourceAsStream(ServletRequest.REQUEST);
D) request.getResourceAsStream();
E) request.getReader();

5. Assume the custom tag my:errorProne always throws a java.lang.RuntimeException with the message "File not found."
An error page has been configured for this JSP page.
Which option prevents the exception thrown by my:errorProne from invoking the error page mechanism, and outputs the message "File not found" in the response?

A) <c:try catch="ex">
< my:errorProne />
< /c:try>
$ {ex.message}
B) <c:catch var="ex">
< my:errorProne />
< /c:catch>
$ {ex.message}
C) <c:try>
< my:errorProne />
< /c:try>
< c:catch var="ex" />
$ {ex.message}
D) <c:try>
<my:errorProne />
<c:catch var="ex" />
${ex.message}
</c:try>
E) <my:errorProne>
< c:catch var="ex">
$ {ex.message}
< /c:catch>
< /my:errorProne>

Solutions: