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

1. Given a portion of a valid Java EE web application's directory structure:
MyApp
|
|-- Directory1
| |-- File1.html
|
|-- META-INF
| |-- File2.html
|
|-- WEB-INF
|-- File3.html
You want to know whether File1.html, File2.html, and/or File3.html is protected from direct access by your web client's browsers.
What statement is true?

A) Only File1.html is directly accessible.
B) All three files are directly accessible.
C) Only File2.html and File3.html are directly accessible.
D) Only File1.html and File2.html are directly accessible.
E) Only File2.html is directly accessible.
F) Only File1.html and File3.html are directly accessible.
G) Only File3.html is directly accessible.

2. Given a header in an HTTP request:
X-Retries: 4
Which two retrieve the value of the header from a given HttpServletRequest request?
(Choose two.)

A) request.getRequestHeader("X-Retries")
B) request.getRequestHeaders("X-Retries").get(0)
C) request.getIntHeader("X-Retries")
D) request.getHeaders("X-Retries").get(0)
E) request.getHeader("X-Retries")

3. You are building a web application that will be used throughout the European Union; therefore, it has significant internationalization requirements. You have been tasked to create a custom tag that generates a message using the java.text.MessageFormat class.
The tag will take the resourceKey attribute and a variable number of argument attributes with the format, arg<N>. Here is an example use of this tag and its output:
< t:message resourceKey='diskFileMsg' arg0='MyDisk' arg1='1247' />
generates:
The disk "MyDisk" contains 1247 file(s).
Which Simple tag class definition accomplishes this goal of handling a variable number of tag attributes?

A) public class MessageTag extends SimpleTagSupport
implements DynamicAttributes {
private Map attributes = new HashMap();
public void putAttribute(String name, Object value) {
this.attributes.put(name, value);
}
// more tag handler methods
}
B) public class MessageTag extends SimpleTagSupport
implements DynamicAttributes {
private Map attributes = new HashMap();
public void setDynamicAttribute(String uri, String name,
Object value) {
this.attributes.put(name, value);
}
// more tag handler methods
}
C) public class MessageTag extends SimpleTagSupport
implements VariableAttributes {
private Map attributes = new HashMap();
public void setVariableAttribute(String uri,
String name, Object value) {
this.attributes.put(name, value);
}
// more tag handler methods
}
D) public class MessageTag extends SimpleTagSupport
implements VariableAttributes {
private Map attributes = new HashMap();
public void putAttribute(String name, Object value) {
this.attributes.put(name, value);
}
// more tag handler methods
}
E) The Simple tag model does NOT support a variable number of attributes.

4. 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) 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.
C) 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.
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.

5. DRAG DROP
Click the Task button.
Given a request from mybox.example.com, with an IP address of 10.0.1.11 on port 33086, place the appropriate ServletRequest methods onto their corresponding return values.

Solutions: