SUN 310-083 Exam Questions : Sun Certified Web Component Developer for J2EE 5

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 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' />";
• B. 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' />";
• C. 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' />";
• D. 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' />";

You have built a collection of custom tags for your web application. The TLD file is located in the file: /WEB-INF/myTags.xml. You refer to these tags in your JSPs using the symbolic name: myTags. Which deployment descriptor element must you use to make this link between the symbolic name and the TLD file name?

• A. <tags>
  < name>myTags</name>
  < location>/WEB-INF/myTags.xml</location>
  < /tags>
• B. <tags>
  < tags-uri>myTags</taglib-uri>
  < tags-location>/WEB-INF/myTags.xml</tags-location>
  < /tags>
• C. <taglib>
  < taglib-uri>myTags</taglib-uri>
  < taglib-location>/WEB-INF/myTags.xml</taglib-location>
  < /taglib>
• D. <taglib>
  < name>myTags</name>
  < location>/WEB-INF/myTags.xml</location>
  < /taglib>

Which two JSTL URL-related tags perform URL rewriting? (Choose two.)

• A. param
• B. link
• C. url
• D. redirect
• E. import

Click the Exhibit button.
Given:
1 1. <% com.example.Advisor advisor = new com.example.Advisor(); %>
1 2. <% request.setAttribute("foo", advisor); %>
Assuming there are no other "foo" attributes in the web application, which three are valid
EL expressions for retrieving the advice property of advisor? (Choose three.)

• A. ${requestScope["foo"["advice"]]}
• B. ${requestScope[foo[advice]]}
• C. ${requestScope.foo.advice}
• D. ${request.foo.advice}
• E. ${foo.advice}
• F. ${requestScope["foo"]["advice"]}

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 SessionAttributeListener class and implement the attributeDeleted method and log the attribute name using the getAttributeName 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 HttpSessionAttributeListener class and implement the attributeRemoved method and log the attribute name using the getName 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.