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CX-310-084 PDF DEMO:
QUESTION NO: 1
A developer is designing a web application that makes many fine-grained remote data requests for each client request. During testing, the developer discovers that the volume of remote requests significantly degrades performance of the application.
Which design pattern provides a solution for this problem?
A. Flyweight
B. Transfer Object
C. Service Locator
D. Dispatcher View
E. Business Delegate
F. Model-View-Controller
Answer: B
QUESTION NO: 2
A developer is designing a web application that must verify for each request:
The originating request is from a trusted network.
The client has a valid session.
The client has been authenticated.
Which design pattern provides a solution in this situation?
A. Transfer Object
B. Session Facade
C. Intercepting Filter
D. Template Method
E. Model-View-Controller
Answer: C
QUESTION NO: 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 VariableAttributes {
private Map attributes = new HashMap();
public void setVariableAttribute(String uri,
String name, Object value) {
this.attributes.put(name, value);
}
// more tag handler methods
}
B. The Simple tag model does NOT support a variable number of attributes.
C. 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
}
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. 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
}
Answer: E
QUESTION NO: 4
Click the Exhibit button.
Given that HighlightTag extends SimpleTagSupport, which three steps are necessary to implement the tag handler for the highlight tag? (Choose three).
A. add a doTag method
B. add a doStartTag method
C. add a getter and setter for the color attribute
D. create and implement a TagExtraInfo class
E. implement the DynamicAttributes interface
F. add a getter and setter for the word1 and word2 attributes
Answer: ACE
QUESTION NO: 5
You web application uses a lot of Java enumerated types in the domain model of the application. Built into each enum type is a method, getDisplay(), which returns a localized, user-oriented string. There are many uses for presenting enums within the web application, so your manager has asked you to create a custom tag that iterates over the set of enum values and processes the body of the tag once for each value; setting the value into a page-scoped attribute called, enumValue. Here is an example of how this tag is used:
You have decided to use the Simple tag model to create this tag handler.
Which tag handler method will accomplish this goal?
A. public void doTag() throw JspException {
try {
for ( Enum value : getEnumValues() ) {
pageContext.setAttribute("enumValue", value);
getJspBody().invoke(getOut());
}
} (Exception e) { throw new JspException(e); }
}
B. public void doTag()
throw JspException {
try {
for ( Enum value : getEnumValues() ) {
getJspContext().setAttribute("enumValue", value);
getJspBody().invoke(null);
}
} (Exception e) { throw new JspException(e); }
}
C. public void doTag() throw JspException {
try {
for ( Enum value : getEnumValues() ) {
getJspContext().setAttribute("enumValue", value);
getJspBody().invoke(getJspContext().getWriter());
}
}
(Exception e) { throw new JspException(e); }
}
D. public void doTag() throw JspException {
try {
for (
Enum value : getEnumValues() ) {
pageContext.setAttribute("enumValue", value);
getJspBody().invoke(getJspContext().getWriter());
}
} (Exception e) { throw new JspException(e); }
}
Answer: B
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Updated: May 28, 2022