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

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最新的 SCWCD 310-083 免費考試真題:

1. Which three are true about servlet filters? (Choose three.)

A) A servlet that is to have a filter applied to it must implement the javax.servlet.FilterChain interface.
B) For each <filter> element in the web application deployment descriptor, multiple instances of a filter may be created by the web container.
C) A filter that is part of a filter chain passes control to the next filter in the chain by invoking the FilterChain.forward method.
D) A filter must implement the destroy method.
E) A servlet may have multiple filters associated with it.
F) A filter must implement the doFilter method.

2. You are building a dating service web site. Part of the form to submit a client's profile is a group of radio buttons for the person's hobbies:
20. <input type='radio' name='hobbyEnum' value='HIKING'>Hiking <br>
21. <input type='radio' name='hobbyEnum' value='SKIING'>Skiing <br>
22. <input type='radio' name='hobbyEnum' value='SCUBA'>SCUBA Diving
23. <!-- and more options -->
After the user submits this form, a confirmation screen is displayed with these hobbies listed. Assume that an application-scoped variable, hobbies, holds a map between the
Hobby enumerated type and the display name.
Which EL code snippet will display Nth element of the user's selected hobbies?

A) ${hobbies[paramValues.hobbyEnum[N]]}
B) ${hobbies.get(paramValues.hobbyEnum[N])}
C) ${hobbies[paramValues@'hobbyEnum'@N]}
D) ${hobbies[hobbyEnum[N]}
E) ${hobbies[paramValues.hobbyEnum.get(N)]}

3. 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 {
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' />";
B) 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' />";
C) 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' />";
D) 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' />";

4. In a JSP-centric web application, you need to create a catalog browsing JSP page. The catalog is stored as a List object in the catalog attribute of the webapp's ServletContext object. Which scriptlet code snippet gives you access to the catalog object?

A) <% List catalog = application.getAttribute("catalog"); %>
B) <% List catalog = context.getAttribute("catalog"); %>
C) <% List catalog = servletContext.getAttribute("catalog"); %>
D) <% List catalog = config.getAttribute("catalog"); %>

5. In an n-tier application, which two invocations are typically remote, not local? (Choose two.)

A) Controller to Business Delegate
B) JSP to Transfer Object
C) Controller to request object
D) Service Locator to JNDI
E) Transfer Object to Entity Bean
F) Business Delegate to Service Locator

問題與答案：