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

1. You are creating a library of custom tags that mimic the HTML form tags. When the user submits a form that fails validation, the JSP form is forwarded back to the user. The <t:textField> tag must support the ability to re-populate the form field with the request parameters from the user's last request. For example, if the user entered "Samantha" in the text field called firstName, then the form is re-populated like this:
<input type='text' name='firstName' value='Samantha' />
Which tag handler method will accomplish this goal?

A) public int doStartTag() throws JspException {
JspContext ctx = getJspContext();
String value = ctx.getParameter(this.name);
if ( value == null ) value = "";
JspWriter out = pageContext.getOut();
try {
out.write(String.format(INPUT, this.name, value));
} (Exception e) { throw new JspException(e); }
return SKIP_BODY;
}
private static String INPUT
= "<input type='text' name='%s' value='%s' />";
B) public void doTag() throws JspException {
ServletRequet request = pageContext.getRequest();
String value = request.getParameter(this.name);
if ( value == null ) value = "";
JspWriter out = pageContext.getOut();
try {
out.write(String.format(INPUT, this.name, value));
} (Exception e) { throw new JspException(e); }
}
private static String INPUT
= "<input type='text' name='%s' value='%s' />";
C) public int doStartTag() throws JspException {
ServletRequet request = pageContext.getRequest();
String value = request.getParameter(this.name);
if ( value == null ) value = "";
JspWriter out = pageContext.getOut();
try {
out.write(String.format(INPUT, this.name, value));
} (Exception e) { throw new JspException(e); }
return SKIP_BODY;
}
private static String INPUT
= "<input type='text' name='%s' value='%s' />";
D) public void doTag() throws JspException {
JspContext ctx = getJspContext();
String value = ctx.getParameter(this.name);
if ( value == null ) value = "";
JspWriter out = pageContext.getOut();
try {
out.write(String.format(INPUT, this.name, value));
} (Exception e) { throw new JspException(e); }
}
private static String INPUT
= "<input type='text' name='%s' value='%s' />";

2. Given an EL function declared with:
11.
<function>
12.
<name>spin</name>
13.
<function-class>com.example.Spinner</function-class>
14.
<function-signature>
15.
java.lang.String spinIt()
16.
</function-signature>
17.
</function>
Which two are true? (Choose two.)

A) The function class must be named Spinner, and must be in the package com.example.
B) The function method must have the signature: public String spinIt().
C) The method must be mapped to the logical name "spin" in the web.xml file.
D) The function method must have the signature: public String spin().
E) The function method must have the signature public static String spin().
F) The function method must have the signature: public static String spinIt().

3. What is the purpose of session management?

A) To manage the user's login and logout activities.
B) To tell the web container to keep the HTTP connection alive so it can make subsequent requests without the delay of making the TCP connection.
C) To store information on the server-side between HTTP requests.
D) To store information on the client-side between HTTP requests.

4. Given the web application deployment descriptor elements:
11.
<filter>
12.
<filter-name>ParamAdder</filter-name>
13.
<filter-class>com.example.ParamAdder</filter-class>
14.
</filter> ...
24.
<filter-mapping>
25.
<filter-name>ParamAdder</filter-name>
26.
<servlet-name>MyServlet</servlet-name>
27.
<!-- insert element here -->
28.
</filter-mapping>
Which element, inserted at line 27, causes the ParamAdder filter to be applied when MyServlet is invoked by another servlet using the RequestDispatcher.include method?

A) <filter-condition>include</filter-condition>
B) <include/>
C) <dispatcher>INCLUDE</dispatcher>
D) <dispatcher>include</dispatcher>
E) <filter-condition>INCLUDE</filter-condition>

5. A developer wants to make a name attribute available to all servlets associated with a particular user, across multiple requests from that user, from the same browser instance.
Which two provide this capability from within a tag handler? (Choose two.)

A) pageContext.setAttribute("name", theValue, PageContext.PAGE_SCOPE);
B) pageContext.setAttribute("name", getSession());
C) pageContext.getSession().setAttribute("name", theValue);
D) pageContext.setAttribute("name", theValue, PageContext.SESSION_SCOPE);
E) pageContext.setAttribute("name", theValue);
F) pageContext.getRequest().setAttribute("name", theValue);

Solutions: