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

1. Which activity supports the data integrity requirements of an application?

A) using forms-based authentication
B) using HTTPS as a protocol
C) using HTTP Basic authentication
D) using an LDAP security realm

2. You web application uses a lot of Java enumerated types in the domain model of the application. Built into each enum type is a method, getDisplay(), which returns a localized, user-oriented string. There are many uses for presenting enums within the web application, so your manager has asked you to create a custom tag that iterates over the set of enum values and processes the body of the tag once for each value; setting the value into a page-scoped attribute called, enumValue. Here is an example of how this tag is used:
10.
<select name='season'>
11.
<t:everyEnum type='com.example.Season'>
12.
<option value='${enumValue}'>${enumValue.display}</option>
13.
</t:everyEnum>
14.
</select>
You have decided to use the Simple tag model to create this tag handler.
Which tag handler method will accomplish this goal?

A) public void doTag() throw JspException {
try {
for ( Enum value : getEnumValues() ) {
getJspContext().setAttribute("enumValue", value);
getJspBody().invoke(null);
}
} (Exception e) { throw new JspException(e); }
}
B) public void doTag() throw JspException {
try {
for ( Enum value : getEnumValues() ) {
pageContext.setAttribute("enumValue", value);
getJspBody().invoke(getJspContext().getWriter());
}
} (Exception e) { throw new JspException(e); }
}
C) public void doTag() throw JspException {
try {
for ( Enum value : getEnumValues() ) {
pageContext.setAttribute("enumValue", value);
getJspBody().invoke(getOut());
}
} (Exception e) { throw new JspException(e); }
}
D) public void doTag() throw JspException {
try {
for ( Enum value : getEnumValues() ) {
getJspContext().setAttribute("enumValue", value);
getJspBody().invoke(getJspContext().getWriter());
}
} (Exception e) { throw new JspException(e); }
}

3. You have created a JSP that includes instance variables and a great deal of scriptlet code. Unfortunately, after extensive load testing, you have discovered several race conditions in your JSP scriptlet code. To fix these problems would require significant recoding, but you are already behind schedule. Which JSP code snippet can you use to resolve these concurrency problems?

A) <%@ implements SingleThreadModel %>
B) <%@ page useSingleThreadModel='true' %>
C) <%@ page isThreadSafe='false' %>
D) <%! implements SingleThreadModel %>
E) <%@ page implements='SingleThreadModel' %>

4. A JSP page contains a taglib directive whose uri attribute has the value dbtags. Which XML element within the web application deployment descriptor defines the associated TLD?

A) <tld>
<tld-uri>dbtags</tld-uri>
<tld-location>/WEB-INF/tlds/dbtags.tld</tld-location>
</tld>
B) <tld>
<uri>dbtags</uri>
<location>/WEB-INF/tlds/dbtags.tld</location>
</tld>
C) <taglib>
<taglib-uri>dbtags</taglib-uri>
<taglib-location>
/WEB-INF/tlds/dbtags.tld
</taglib-location>
</taglib>
D) <taglib>
<uri>dbtags</uri>
<location>/WEB-INF/tlds/dbtags.tld</location>
</taglib>

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

Solutions: