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

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

2. 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);
B) pageContext.setAttribute("name", theValue,
PageContext.SESSION_SCOPE);
C) pageContext.setAttribute("name", getSession());
D) pageContext.getSession().setAttribute("name", theValue);
E) pageContext.getRequest().setAttribute("name", theValue);
F) pageContext.setAttribute("name", theValue,
PageContext.PAGE_SCOPE);

3. Which two are true regarding a web application class loader? (Choose two.)

A) A web application running in a J2EE product may override classes in the javax.* namespace.
B) Resources in the WAR class directory or in any of the JAR files within the library directory may be accessed using the J2SE semantics of getResource.
C) A web application may override the web container's implementation classes.
D) Resources in the WAR class directory or in any of the JAR files within the library directory CANNOT be accessed using the J2SE semantics of getResource.
E) A web application class loader may NOT override any classes in the java.* and javax.* namespaces.

4. In which three directories, relative to a web application's root, may a tag library descriptor file reside when deployed directly into a web application? (Choose three.)

A) /WEB-INF/resources
B) /META-INF/tlds
C) /META-INF
D) /META-INF/resources
E) /WEB-INF/tlds
F) /WEB-INF

5. You have been contracted to create a web site for a free dating service. One feature is the ability for one client to send a message to another client, which is displayed in the latter client's private page. Your contract explicitly states that security is a high priority.
Therefore, you need to prevent cross-site hacking in which one user inserts JavaScript code that is then rendered and invoked when another user views that content. Which two
JSTL code snippets will prevent cross-site hacking in the scenario above? (Choose two.)

A) <c:out>${message}</c:out>
B) <c:out value='${message}' />
C) <c:out value='${message}' escapeXml='true' />
D) <c:out value='${message}' eliminateXml='true' />
E) <c:out eliminateXml='true'>${message}</c:out>

Solutions: