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

1. The tl:taskList and tl:task tags output a set of tasks to the response and are used as follows:
11.
<tl:taskList>
12.
<tl:task name="Mow the lawn" />
13.
<tl:task name="Feed the dog" />
14.
<tl:task name="Do the laundry" />
15.
</tl:taskList>
The tl:task tag supplies information about a single task while the tl:taskList tag does the final output. The tag handler for tl:taskList is TaskListTag. The tag handler for tl:task is TaskTag. Both tag handlers extend BodyTagSupport.
Which allows the tl:taskList tag to get the task names from its nested tl:task children?

A) Create an addTaskName method in TaskListTag. Have the TaskListTag.doStartTag method, return BodyTag.EVAL_BODY_BUFFERE In the TaskTag.doStartTag method, call super.getParent(), cast it to a TaskListTag, and call addTaskName().
B) Create an addTaskName method in TaskListTag. Have the TaskListTag.doStartTag method, return BodyTag.EVAL_BODY_BUFFERED. In the TaskTag.doStartTag method, call findAncestorWithClass() on the PageContext, passing TaskListTag as the class to find. Cast the result to TaskListTag and call addTaskName().
C) In the TaskListTag.doStartTag method, call super.getChildTags() and iterate through the results. Cast each result to a TaskTag and call getName().
D) In the TaskListTag.doStartTag method, call getChildTags() on the PageContext and iterate through the results. Cast each result to a TaskTag and call getName().
E) It is impossible for a tag handler that extends BodyTagSupport to communicate with its parent and child tags.

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(getJspContext().getWriter());
}
} (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(null);
}
} (Exception e) { throw new JspException(e); }
}

3. Given:
11.
<%
12.
request.setAttribute("vals", new String[]{"1","2","3","4"});
13.
request.setAttribute("index", "2");
14.
%>
15.
<%-- insert code here --%>
Which three EL expressions, inserted at line 15, are valid and evaluate to "3"? (Choose three.)

A) ${vals}[index]
B) ${vals["2"]}
C) ${vals[vals[index-1]]}
D) ${vals[index]}
E) ${vals.(vals.index)}
F) ${vals.2}
G) ${vals.index}

4. For debugging purposes, you need to record how many times a given JSP is invoked before the user's session has been created. The JSP's destroy method stores this information to a database. Which JSP code snippet keeps track of this count for the lifetime of the JSP page?

A) <%@ int count = 0; %>
<% if ( request.getSession(false) == null ) count++; %>
B) <%! int count = 0;
if ( request.getSession(false) == null ) count++; %>
C) <%! int count = 0; %>
<% if ( request.getSession(false) == null ) count++; %>
D) <% int count = 0;
if ( request.getSession(false) == null ) count++; %>
E) <%@ int count = 0;
if ( request.getSession(false) == null ) count++; %>

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

Solutions: