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

1. Your web application uses a simple architecture in which servlets handle requests and then forward to a JSP using a request dispatcher. You need to pass information calculated by the servlet to the JSP; furthermore, that JSP uses a custom tag and must also process this information. This information must NOT be accessible to any other servlet, JSP or session in the webapp. How can you accomplish this goal?

A) This CANNOT be done as the tag handler has no means to extract this data.
B) Add an attribute to the request object before using the request dispatcher.
C) Add an attribute to the context object before using the request dispatcher.
D) Store the data in a public instance variable in the servlet.

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

3. Which is a benefit of precompiling a JSP page?

A) It provides the ability to debug runtime errors in the application.
B) It avoids initialization on the first request.
C) It avoids execution of the _jspService method on the first request.
D) It provides better performance on the first request for the JSP page.

4. Which interface must a class implement so that instances of the class are notified after any object is added to a session?

A) javax.servlet.http.HttpSessionBindingListener
B) javax.servlet.http.HttpSessionAttributeListener
C) javax.servlet.http.HttpSessionValueListener
D) javax.servlet.http.HttpSessionListener

5. All of your JSPs need to have a link that permits users to email the web master. This web application is licensed to many small businesses, each of which have a different email address for the web master. You have decided to use a context parameter that you specify in the deployment descriptor, like this:
42.
<context-param>
43.
<param-name>webmasterEmail</param-name>
44.
<param-value>[email protected]</param-value>
45.
</context-param>
Which JSP code snippet creates this email link?

A) <a href='mailto:${applicationScope.webmasterEmail}'>contact us</a>
B) <a href='mailto:${contextInitParam.webmasterEmail}'>contact us</a>
C) <a href='mailto:${initParam.webmasterEmail}'>contact us</a>
D) <a href='mailto:${contextParam.webmasterEmail}'>contact us</a>

Solutions: