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SUN Sun Certified Web Component Developer for J2EE 5 Sample Questions:

1. You are creating an error page that provides a user-friendly screen whenever a server exception occurs. You want to hide the stack trace, but you do want to provide the exception's error message to the user so the user can provide it to the customer service agent at your company. Which EL code snippet inserts this error message into the error page?

A) Message: <b>${request.exception.errorMessage}</b>
B) Message: <b>${pageContext.exception.errorMessage}</b>
C) Message: <b>${exception.errorMessage}</b>
D) Message: <b>${exception.message}</b>
E) Message: <b>${request.exception.message}</b>
F) Message: <b>${pageContext.exception.message}</b>

2. Given the security constraint in a DD:
1 01. <security-constraint>
1 02. <web-resource-collection>
1 03. <web-resource-name>Foo</web-resource-name>
1 04. <url-pattern>/Bar/Baz/*</url-pattern>
1 05. <http-method>POST</http-method>
1 06. </web-resource-collection>
1 07. <auth-constraint>
1 08. <role-name>DEVELOPER</role-name>
1 09. </auth-constraint>
1 10. </security-constraint>
And given that "MANAGER" is a valid role-name, which four are true for this security constraint? (Choose four.)

A) MANAGER can do a TRACE on any resource in the /Bar/Baz directory.
B) DEVELOPER can do a GET on resources in the /Bar/Baz directory.
C) DEVELOPER can do only a POST on resources in the /Bar/Baz directory.
D) MANAGER can do a GET on resources in the /Bar/Baz directory.
E) DEVELOPER can do a TRACE on any resource in the /Bar/Baz directory.
F) MANAGER can do a POST on any resource in the /Bar/Baz directory.

3. After a merger with another small business, your company has inherited a legacy WAR file but the original source files were lost. After reading the documentation of that web application, you discover that the WAR file contains a useful tag library that you want to reuse in your own webapp packaged as a WAR file.
What do you need to do to reuse this tag library?

A) Unpack the legacy WAR file, move the TLD file to the META-INF directory, move the class files to the top-level directory, repackage the whole thing as a JAR file, and place that
JAR file in your webapp's library directory.
B) Unpack the legacy WAR file, move the TLD file to the META-INF directory, repackage the whole thing as a JAR file, and place that JAR file in your webapp's library directory.
C) Unpack the legacy WAR file, move the TLD file to the META-INF directory, move the class files to the top-level directory, repackage the WAR, and place that WAR file in your webapp's WEB-INF directory.
D) Simply rename the legacy WAR file as a JAR file and place it in your webapp's library directory.

4. Given:
5 . public class MyTagHandler extends TagSupport {
6 . public int doStartTag() throws JspException {
7 . try {
8 . // insert code here
9 . } catch(Exception ex) { /* handle exception */ }
1 0. return super.doStartTag();
1 1. }
...
42. }
Which code snippet, inserted at line 8, causes the value foo to be output?

A) JspWriter w = new JspWriter(pageContext.getWriter());
w.print("foo");
B) JspWriter w = pageContext.getOut();
w.print("foo");
C) JspWriter w = pageContext.getWriter();
w.print("foo");
D) JspWriter w = new JspWriter(pageContext.getResponse());
w.print("foo");

5. Your company has a corporate policy that prohibits storing a customer's credit card number in any corporate database. However, users have complained that they do NOT want to re- enter their credit card number for each transaction. Your management has decided to use client-side cookies to record the user's credit card number for 120 days. Furthermore, they also want to protect this information during transit from the web browser to the web container; so the cookie must only be transmitted over HTTPS. Which code snippet creates the "creditCard" cookie and adds it to the out going response to be stored on the user's web browser?

A) 10. Cookie c = new Cookie("creditCard", usersCard);
1 1. c.setSecure(true);
1 2. c.setAge(10368000);
1 3. response.setCookie(c);
B) 10. Cookie c = new Cookie("creditCard", usersCard);
1 1. c.setSecure(true);
1 2. c.setMaxAge(10368000);
1 3. response.addCookie(c);
C) 10. Cookie c = new Cookie("creditCard", usersCard);
1 1. c.setHttps(true);
1 2. c.setMaxAge(10368000);
1 3. response.setCookie(c);
D) 10. Cookie c = new Cookie("creditCard", usersCard);
1 1. c.setHttps(true);
1 2. c.setAge(10368000);
1 3. response.addCookie(c);
E) 10. Cookie c = new Cookie("creditCard", usersCard);
1 1. c.setSecure(true);
1 2. c.setAge(10368000);
1 3. response.addCookie(c);

Solutions: