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

1. The Squeaky Bean company has decided to port their web application to a new J2EE 1.4 container. While reviewing the application, a developer realizes that in multiple places within the current application, nearly duplicate code exists that finds enterprise beans.
Which pattern should be used to eliminate this duplicate code?

A) Intercepting Filter
B) Front Controller
C) Model-View-Controller
D) Transfer Object
E) Business Delegate
F) Service Locator

2. Given a web application in which the cookie userName is expected to contain the name of the user. Which EL expression evaluates to that user name?

A) ${userName}
B) ${cookies.get('userName')}
C) ${cookies.userName[0]}
D) ${cookies.userName}[1]
E) ${cookie.userName}
F) ${cookie.user.name}

3. 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) DEVELOPER 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) MANAGER can do a GET on resources in the /Bar/Baz directory.
D) DEVELOPER can do only a POST on resources in the /Bar/Baz directory.
E) MANAGER 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.

4. A developer is designing a web application that must support multiple interfaces, including:
an XML web service for B2B
HTML for web-based clients
WML for wireless customers
Which design pattern provides a solution for this problem?

A) Chain of Responsibility
B) Data Access Object
C) Session Facade
D) Model-View-Controller
E) Business Delegate

5. What is true about Java EE authentication mechanisms?

A) If your deployment descriptor correctly declares an authentication type of BASIC, the container automatically requests a user name and password whenever a user starts a new session.
B) If you want your web application to support the widest possible array of browsers, and you want to perform authentication, the best choice of Java EE authentication mechanisms is DIGEST.
C) To use Java EE FORM authentication, you must declare two HTML files in your deployment descriptor, and you must use a predefined action in the HTML file that handles your user's login.
D) If your deployment descriptor correctly declares an authentication type of
CLIENT_CERT, your users must have a certificate from an official source before they can use your application.

Solutions: