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

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

2. Given that a scoped attribute cart exists only in a user's session, which two, taken independently, ensure the scoped attribute cart no longer exists? (Choose two.)

A) <c:remove scope="session">${cart}</c:remove>
B) <c:remove var="cart" scope="session" />
C) <c:remove var="${cart}" scope="session" />
D) ${cart = null}
E) <c:remove var="${cart}" />
F) <c:remove var="cart" />
G) <c:remove scope="session">cart</c:remove>

3. A developer is designing a multi-tier web application and discovers a need to log each incoming client request. Which two patterns, taken independently, provide a solution for this problem? (Choose two.)

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

4. Given a web application in which the cookie userName is expected to contain the name of the user. Which EL expression evaluates to that user name?

A) ${cookies.userName}[1]
B) ${cookies.userName[0]}
C) ${userName}
D) ${cookies.get('userName')}
E) ${cookie.userName}
F) ${cookie.user.name}

5. Which implicit object is used in a JSP page to retrieve values associated with <context- param> entries in the deployment descriptor?

A) session
B) request
C) application
D) config

Solutions: