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

1. One of the use cases in your web application uses many session-scoped attributes. At the end of the use case, you want to clear out this set of attributes from the session object.
Assume that this static variable holds this set of attribute names:
2 01. private static final Set<String> USE_CASE_ATTRS;
2 02. static {
2 03. USE_CASE_ATTRS.add("customerOID");
2 04. USE_CASE_ATTRS.add("custMgrBean");
2 05. USE_CASE_ATTRS.add("orderOID");
2 06. USE_CASE_ATTRS.add("orderMgrBean");
207. }
Which code snippet deletes these attributes from the session object?

A) session.deleteAllAttributes(USE_CASE_ATTRS);
B) for ( String attr : USE_CASE_ATTRS ) {
session.removeAttribute(attr);
}
C) session.removeAll(USE_CASE_ATTRS);
D) for ( String attr : USE_CASE_ATTRS ) {
session.deleteAttribute(attr);
}
E) for ( String attr : USE_CASE_ATTRS ) {
session.remove(attr);
}

2. 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) The Simple tag model does NOT support a variable number of attributes.
B) 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
}
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 DynamicAttributes {
private Map attributes = new HashMap();
public void setDynamicAttribute(String uri, String name,
Object value) {
this.attributes.put(name, value);
}
// more tag handler methods
}
E) 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
}

3. Which three are described in the standard web application deployment descriptor?
(Choose three.)

A) context root for the application
B) web container default port bindings
C) servlet instance pool configuration
D) MIME type mappings
E) session configuration
F) ServletContext initialization parameters

4. Given the two security constraints in a deployment descriptor:
1 01. <security-constraint>
1 02. 
1 03. <auth-constraint><role-name>SALES</role-name></auth-
1 03. <auth-constraint>
1 04. <role-name>SALES</role-name>
1 05. </auth-constraint>
1 06. </security-constraint>
1 07. <security-constraint>
1 08. 
1 09. 
1 10. </security-constraint>
If the two security constraints have the same url-pattern and http-method, which two, inserted independently at line 109, will allow users with role names of either SALES or
MARKETING to access this resource? (Choose two.)

A) <auth-constraint>
< role-name>MARKETING</role-name>
< /auth-constraint>
B) <auth-constraint>
< role-name>*</role-name>
< /auth-constraint>
C) <auth-constraint>
< role-name>ANY</role-name>
< /auth-constraint>
D) <auth-constraint/>

5. Which defines the welcome files in a web application deployment descriptor?

A) <welcome-file-list>
< welcome-file>welcome.jsp</welcome-file>
< welcome-file>index.html</welcome-file>
< /welcome-file-list>
B) <welcome-file-list>
< welcome-file>/welcome.jsp</welcome-file>
< welcome-file>/index.html</welcome-file>
< /welcome-file-list>
C) <welcome>
< welcome-file>
< welcome-name>Welcome</welcome-name>
< location>welcome.jsp</location>
< /welcome-file>
< welcome-file>
< welcome-name>Index</welcome-name>
< location>index.html</location>
< /welcome-file>
< /welcome>
D) <welcome>
< welcome-file>welcome.jsp</welcome-file>
< /welcome>
< welcome>
< welcome-file>index.html</welcome-file>
< /welcome>
E) <welcome>
< welcome-file>/welcome.jsp</welcome-file>
< /welcome>
< welcome>
< welcome-file>/index.html</welcome-file>
< /welcome>