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SUN Sun Certified Web Component Developer for J2EE 5 Sample Questions:

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

2. Which EL expression evaluates to the request URI?

A) ${requestScope.request.requestURI}
B) ${pageContext.request.requestURI}
C) ${request.URI}
D) ${request.getURI}
E) ${request.requestURI}
F) ${requestURI}
G) ${requestScope.requestURI}

3. You are creating a JSP page to display a collection of data. This data can be displayed in several different ways so the architect on your project decided to create a generic servlet that generates a comma-delimited string so that various pages can render the data in different ways. This servlet takes on request parameter: objectID. Assume that this servlet is mapped to the URL pattern: /WEB-INF/data.
In the JSP you are creating, you need to split this string into its elements separated by commas and generate an HTML <ul> list from the data.
Which JSTL code snippet will accomplish this goal?

A) <c:import var='dataString' url='/WEB-INF/data'>
< c:param name='objectID' value='${currentOID}' />
< /c:import>
< ul>
< c:forTokens items'${dataString.split(",")}' var='item'>
< li>${item}</li>
< /c:forTokens>
< /ul>
B) <c:import var='dataString' url='/WEB-INF/data'>
< c:param name='objectID' value='${currentOID}' />
< /c:import>
< ul>
< c:forTokens items'${dataString}' delims=',' var='item'>
< li>${item}</li>
< /c:forTokens>
< /ul>
C) <c:import varReader='dataString' url='/WEB-INF/data'>
< c:param name='objectID' value='${currentOID}' />
< /c:import>
< ul>
< c:forTokens items'${dataString.split(",")}' var='item'>
< li>${item}</li>
< /c:forTokens>
< /ul>
D) <c:import varReader='dataString' url='/WEB-INF/data'>
< c:param name='objectID' value='${currentOID}' />
< /c:import>
< ul>
< c:forTokens items'${dataString}' delims=',' var='item'>
< li>${item}</li>
< /c:forTokens>
< /ul>

4. Click the Exhibit button.
The h:highlight tag renders its body, highlighting an arbitrary number of words, each of which is passed as an attribute (word1, word2, ...). For example, a JSP page can invoke the h:highlight tag as follows:
1 1. <h:highlight color="yellow" word1="high" word2="low">
1 2. high medium low
1 3. </h:highlight>
Given that HighlightTag extends SimpleTagSupport, which three steps are necessary to implement the tag handler for the highlight tag? (Choose three).

A) create and implement a TagExtraInfo class
B) implement the DynamicAttributes interface
C) add a getter and setter for the color attribute
D) add a doStartTag method
E) add a doTag method
F) add a getter and setter for the word1 and word2 attributes

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

Solutions: