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

1. 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 WAR, and place that WAR file in your webapp's WEB-INF directory.
B) Simply rename the legacy WAR file as a JAR file and place it 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 whole thing as a JAR file, and place that JAR file in your webapp's library directory.
D) 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.

2. A developer for the company web site has been told that users may turn off cookie support in their browsers. What must the developer do to ensure that these customers can still use the web application?

A) The developer must ensure that every URL is properly encoded using the appropriate URL rewriting APIs.
B) The developer must provide an alternate mechanism for managing sessions and abandon the HttpSession mechanism entirely.
C) The developer must add the string id=<sessionid> to the end of every URL to ensure that the conversation with the browser can continue.
D) The developer can ignore this issue. Web containers are required to support automatic URL rewriting when cookies are not supported.

3. Given:
6.<% int[] nums = {42, 420, 4200};
7.request.setAttribute("foo", nums); %>
Which two successfully translate and result in a value of true? (Choose two.)

A) ${(requestScope['foo'][0] lt 50) && (3 gt 2)}
B) ${true or false}
C) ${requestScope['foo'][1] = 420}
D) ${requestScope[foo][0] > 500}

4. A web application uses the HttpSession mechanism to determine if a user is "logged in." When a user supplies a valid user name and password, an HttpSession is created for that user.
The user has access to the application for only 15 minutes after logging in. The code must determine how long the user has been logged in, and if this time is greater than 15 minutes, must destroy the HttpSession.
Which method in HttpSession is used to accomplish this?

A) invalidateAfter
B) getMaxInactiveInterval
C) getCreationTime
D) getLastAccessedTime

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 reenter 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);
11.
c.setSecure(true);
12.
c.setAge(10368000);
13.
response.setCookie(c);
B) 10. Cookie c = new Cookie("creditCard", usersCard);
11.
c.setHttps(true);
12.
c.setAge(10368000);
13.
response.addCookie(c);
C) 10. Cookie c = new Cookie("creditCard", usersCard);
11.
c.setSecure(true);
12.
c.setAge(10368000);
13.
response.addCookie(c);
D) 10. Cookie c = new Cookie("creditCard", usersCard);
11.
c.setHttps(true);
12.
c.setMaxAge(10368000);
13.
response.setCookie(c);
E) 10. Cookie c = new Cookie("creditCard", usersCard);
11.
c.setSecure(true);
12.
c.setMaxAge(10368000);
13.
response.addCookie(c);

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