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

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

2. Which three are described in the standard web application deployment descriptor?
(Choose three.)

A) servlet instance pool configuration
B) ServletContext initialization parameters
C) MIME type mappings
D) session configuration
E) web container default port bindings
F) context root for the application

3. A web application allows the HTML title banner to be set using a servlet context initialization parameter called titleStr. Which two properly set the title in this scenario?
(Choose two.)

A) <title>${request.get("titleStr")}</title>
B) <title>${initParam.titleStr}</title>
C) <title>${initParam['titleStr']}</title>
D) <title>${paramValues.titleStr}</title>
E) <title>${titleStr}</title>
F) <title>${servletParams.titleStr}</title>
G) <title>${params[0].titleStr}</title>

4. Assume a JavaBean com.example.GradedTestBean exists and has two attributes. The attribute name is of type java.lang.String and the attribute score is of type java.lang.Integer.
An array of com.example.GradedTestBean objects is exposed to the page in a request- scoped attribute called results. Additionally, an empty java.util.HashMap called resultMap is placed in the page scope.
A JSP page needs to add the first entry in results to resultMap, storing the name attribute of the bean as the key and the score attribute of the bean as the value.
Which code snippet of JSTL code satisfies this requirement?

A) <c:set var="${resultMap}" key="${results[0].name}"
value="${results[0].score}" />
B) ${resultMap[results[0].name] = results[0].score}
C) <c:set var="resultMap" property="${results[0].name}"
value="${results[0].score}" />
D) <c:set var="resultMap" property="${results[0].name}">
$ {results[0].value}
< /c:set>
E) <c:set target="${resultMap}" property="${results[0].name}"
value="${results[0].score}" />

5. Your web application requires the adding and deleting of many session attributes during a complex use case. A bug report has come in that indicates that an important session attribute is being deleted too soon and a NullPointerException is being thrown several interactions after the fact. You have decided to create a session event listener that will log when attributes are being deleted so you can track down when the attribute is erroneously being deleted.
Which listener class will accomplish this debugging goal?

A) Create an HttpSessionAttributeListener class and implement the attributeRemoved method and log the attribute name using the getName method on the event object.
B) Create an SessionAttributeListener class and implement the attributeRemoved method and log the attribute name using the getAttributeName method on the event object.
C) Create an SessionAttributeListener class and implement the attributeDeleted method and log the attribute name using the getAttributeName method on the event object.
D) Create an HttpSessionAttributeListener class and implement the attributeDeleted method and log the attribute name using the getName method on the event object.

Solutions: