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

1. You are creating an error page that provides a user-friendly screen whenever a server exception occurs. You want to hide the stack trace, but you do want to provide the
exception's error message to the user so the user can provide it to the customer service agent at your company. Which EL code snippet inserts this error message into the error page?

A) Message: <b>${request.exception.errorMessage}</b>
B) Message: <b>${pageContext.exception.errorMessage}</b>
C) Message: <b>${request.exception.message}</b>
D) Message: <b>${exception.errorMessage}</b>
E) Message: <b>${exception.message}</b>
F) Message: <b>${pageContext.exception.message}</b>

2. Which three are true about servlet filters? (Choose three.)

A) A servlet may have multiple filters associated with it.
B) A filter that is part of a filter chain passes control to the next filter in the chain by invoking the FilterChain.forward method.
C) A filter must implement the destroy method.
D) A filter must implement the doFilter method.
E) A servlet that is to have a filter applied to it must implement the javax.servlet.FilterChain interface.
F) For each <filter> element in the web application deployment descriptor, multiple instances of a filter may be created by the web container.

3. Which three are true about the HttpServletRequestWrapper class? (Choose three.)

A) The HttpServletRequestWrapper is an example of the Decorator pattern.
B) An HttpServletRequestWrapper may be used only by a class implementing the javax.servlet.Filter interface.
C) A subclass of HttpServletRequestWrapper CANNOT modify the behavior of the getReader method.
D) The HttpServletRequestWrapper can be used to extend the functionality of a servlet request.
E) An HttpServletRequestWrapper CANNOT be used on the request passed to the RequestDispatcher.include method.
F) An HttpServletRequestWrapper may modify the header of a request within an object implementing the javax.servlet.Filter interface.

4. Your web application views all have the same header, which includes the <title> tag in the <head> element of the rendered HTML. You have decided to remove this redundant HTML code from your JSPs and put it into a single JSP called /WEB-INF/jsp/header.jsp. However, the title of each page is unique, so you have decided to use a variable called pageTitle to parameterize this in the header JSP, like this:
10. <title>${param.pageTitle}<title>
Which JSP code snippet should you use in your main view JSPs to insert the header and pass the pageTitle variable?

A) <jsp:include page='/WEB-INF/jsp/header.jsp'>
${pageTitle='Welcome Page'}
</jsp:include>
B) <jsp:include file='/WEB-INF/jsp/header.jsp'>
${pageTitle='Welcome Page'}
</jsp:include>
C) <jsp:include page='/WEB-INF/jsp/header.jsp'> <jsp:param name='pageTitle' value='Welcome Page' /> </jsp:include>
D) <jsp:insert page='/WEB-INF/jsp/header.jsp'>
<jsp:param name='pageTitle' value='Welcome Page' />
</jsp:insert>
E) <jsp:insert page='/WEB-INF/jsp/header.jsp'>
${pageTitle='Welcome Page'}
</jsp:insert>

5. Given this fragment from a Java EE deployment descriptor:
124.
<welcome-file>beta.html</welcome-file>
125.
<welcome-file>alpha.html</welcome-file>
And this request from a browser:
http://www.sun.com/SCWCDtestApp/register
Which statement is correct, when the container receives this request?

A) The container first looks in the register directory for beta.html.
B) The container first looks for a servlet mapping in the deployment descriptor.
C) This deployment descriptor is NOT valid.
D) The container first looks in the register directory for alpha.html.

Solutions: