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

1. Which two are characteristics of the Service Locator pattern? (Choose two.)

A) It increases source code duplication and decreases reuse.
B) It degrades network performance due to increased access to distributed lookup services.
C) It encapsulates component lookup procedures.
D) It improves client performance by caching context and factory objects.

2. Which two statements are true about the security-related tags in a valid Java EE deployment descriptor? (Choose two.)

A) Every <security-constraint> tag must have at least one <http-method> tag.
B) It is possible to construct a valid <security-constraint> tag such that, for a given resource, no user roles can access that resource.
C) A given <auth-constraint> tag can apply to only one <web-resource-collection> tag.
D) A given <web-resource-collection> tag can contain from zero to many <url-pattern> tags.
E) A <security-constraint> tag can have many <web-resource-collection> tags.

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

4. Which two are true about the JSTL core iteration custom tags? (Choose two.)

A) It may iterate over a map, but only the key of the mapping may be used in the tag body.
B) When looping over integers (for example begin='1' end='10'), a loop status object may not be used in the tag body.
C) The body of the tag may contain EL code, but not scripting code.
D) When looping over collections, a loop status object may be used in the tag body.
E) It may iterate over arrays, collections, maps, and strings.

5. Which two JSTL URL-related tags perform URL rewriting? (Choose two.)

A) redirect
B) link
C) param
D) import
E) url

Solutions: