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ExamPDF is a third-party service provider focused on providing IT industry certification exam, with our developing and operational teams, we mainly provide a variety of training materials in the IT industry such as Cisco, Sun, compTIA, IBM, HP, Oracle, VMWare, etc. We guarantee that you can pass those popular IT certification exams at your first try. With only 10-12 hours study of our study guides, you will be 100% ready to pass the exams most efficiently with high scores and get certified with ease.

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ExamPDF

Exam : 310-083

Title : Sun Certified Web

Component Developer for

J2EE 5

Version : Demo

http://www.exampdf.com/
IT certification training material, The fastest way to pass the exam.

The safer , easier way to help you pass any IT exams.
1. To take advantage of the capabilities of modern browsers that use web standards, such as XHTML and
CSS, your web application is being converted from simple JSP pages to JSP Document format. However,
one of your JSPs, /scripts/screenFunctions.jsp, generates a JavaScript file. This file is included in several
web forms to create screen-specific validation functions and are included in these pages with the
following statement:
10. <head>
11. <script src='/scripts/screenFunctions.jsp'
12.
language='javascript'
13.
type='application/javascript'> </script>
14. </head>
15. 
Which JSP code snippet declares that this JSP Document is a JavaScript file?
A. <%@ page contentType='application/javascript' %>
B. <jsp:page contentType='application/javascript' />
C. <jsp:document contentType='application/javascript' />
D. <jsp:directive.page contentType='application/javascript' />
E. No declaration is needed because the web form XHTML page already declares the MIME type of the
/scripts/screenFunctions.jsp file in the <script> tag.
Answer: D
2. Given the JSP code:
10. <html>
11. <body>
12. <jsp:useBean id='customer' class='com.example.Customer' />
13. Hello, ${customer.title} ${customer.lastName}, welcome
14. to Squeaky Beans, Inc.
15. </body>
16. </html>
Which three types of JSP code are used? (Choose three.)
A. Java code
B. template text
C. scripting code
D. standard action
E. expression language
Answer: BDE
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The safer , easier way to help you pass any IT exams.
3. You have built a collection of custom tags for your web application. The TLD file is located in the file:
/WEB-INF/myTags.xml. You refer to these tags in your JSPs using the symbolic name: myTags. Which
deployment descriptor element must you use to make this link between the symbolic name and the TLD
file name?
A. <taglib>
<name>myTags</name>
<location>/WEB-INF/myTags.xml</location>
</taglib>
B. <tags>
<name>myTags</name>
<location>/WEB-INF/myTags.xml</location>
</tags>
C. <tags>
<tags-uri>myTags</taglib-uri>
<tags-location>/WEB-INF/myTags.xml</tags-location>
</tags>
D. <taglib>
<taglib-uri>myTags</taglib-uri>
<taglib-location>/WEB-INF/myTags.xml</taglib-location>
</taglib>
Answer: D
4. Which implicit object is used in a JSP page to retrieve values associated with <context-param> entries
in the deployment descriptor?
A. config
B. request
C. session
D. application
Answer: D
5. You have created a JSP that includes instance variables and a great deal of scriptlet code.
Unfortunately, after extensive load testing, you have discovered several race conditions in your JSP
scriptlet code. To fix these problems would require significant recoding, but you are already behind
schedule. Which JSP code snippet can you use to resolve these concurrency problems?
A. <%@ page isThreadSafe='false' %>
B. <%@ implements SingleThreadModel %>
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C. <%! implements SingleThreadModel %>
D. <%@ page useSingleThreadModel='true' %>
E. <%@ page implements='SingleThreadModel' %>
Answer: A
6. Click the Exhibit button.
The attribute "name" has a value of "Foo,"
What is the result if this tag handler's tag is invoked?
A. Foo
B. done
C. Foodone
D. An exception is thrown at runtime.
E. No output is produced from this code.
F. Compilation fails because of an error in this code.
Answer: A
7. 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
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The safer , easier way to help you pass any IT exams.
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();
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The safer , easier way to help you pass any IT exams.
public void setDynamicAttribute(String uri, String name,
Object value) {
this.attributes.put(name, value);
}
// more tag handler methods
}
Answer: E
8. Given the JSP code:
<% request.setAttribute("foo", "bar"); %>
and the Classic tag handler code:
5. public int doStartTag() throws JspException {
6. // insert code here
7. // return int
8. }
Assume there are no other "foo" attributes in the web application.
Which invocation on the pageContext object, inserted at line 6, assigns "bar" to the variable x?
A. String x = (String) pageContext.getAttribute("foo");
B. String x = (String) pageContext.getRequestScope("foo");
C. It is NOT possible to access the pageContext object from within doStartTag.
D. String x = (String)
pageContext.getRequest().getAttribute("foo");
E. String x = (String) pageContext.getAttribute("foo",
PageContext.ANY_SCOPE);
Answer: D
9. Which two statements about tag files are true? (Choose two.)
A. Classic tag handlers and tag files CANNOT reside in the same tag library.
B. A file named foo.tag, located in /WEB-INF/tags/bar, is recognized as a tag file by the container.
C. A file named foo.tag, bundled in a JAR file but NOT defined in a TLD, triggers a container translation
error.
D. A file named foo.tag, located in a web application's root directory, is recognized as a tag file by the
container.
E. If files foo1.tag and foo2.tag both reside in /WEB-INF/tags/bar, the container will consider them part of
the same tag library.
Answer: BE
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The safer , easier way to help you pass any IT exams.
10. The sl:shoppingList and sl:item tags output a shopping list to the response and are used as follows:
11. <sl:shoppingList>
12. <sl:item name="Bread" />
13. <sl:item name="Milk" />
14. <sl:item name="Eggs" />
15. </sl:shoppingList>
The tag handler for sl:shoppingList is ShoppingListTag and the tag handler for sl:item is ItemSimpleTag.
ShoppingListTag extends BodyTagSupport and ItemSimpleTag extends SimpleTagSupport.
Which is true?
A. ItemSimpleTag can find the enclosing instance of ShoppingListTag by calling getParent() and casting
the result to ShoppingListTag.
B. ShoppingListTag can find the child instances of ItemSimpleTag by calling super.getChildren() and
casting each to an ItemSimpleTag.
C. It is impossible for ItemSimpleTag and ShoppingListTag to find each other in a tag hierarchy because
one is a Simple tag and the other is a Classic tag.
D. ShoppingListTag can find the child instances of ItemSimpleTag by calling getChildren() on the
PageContext and casting each to an ItemSimpleTag.
E. ItemSimpleTag can find the enclosing instance of ShoppingListTag by calling findAncestorWithClass()
on the PageContext and casting the result to ShoppingListTag.
Answer: A
11. Servlet A receives a request that it forwards to servlet B within another web application in the same
web container. Servlet A needs to share data with servlet B and that data must not be visible to other
servlets in A's web application. In which object can the data that A shares with B be stored?
A. HttpSession
B. ServletConfig
C. ServletContext
D. HttpServletRequest
E. HttpServletResponse
Answer: D
12. Your web site has many user-customizable features, for example font and color preferences on web
pages. Your IT department has already built a subsystem for user preferences using the Java SE
platform's lang.util.prefs package APIs, and you have been ordered to reuse this subsystem in your web
application. You need to create an event listener that constructs the preferences factory and stores it in
the application scope for later use. Furthermore, this factory requires that the URL to a database must
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The safer , easier way to help you pass any IT exams.
be declared in the deployment descriptor like this:
42. <context-param>
43. <param-name>prefsDbURL</param-name>
44. <param-value>
45.
jdbc:pointbase:server://dbhost:4747/prefsDB
46. </param-value>
47. </context-param>
Which partial listener class will accomplish this goal?
A. public class PrefsFactoryInitializer implements ContextListener {
public void contextInitialized(ServletContextEvent e) {
ServletContext ctx = e.getContext();
String prefsURL = ctx.getParameter("prefsDbURL");
PreferencesFactory myFactory = makeFactory(prefsURL);
ctx.putAttribute("myPrefsFactory", myFactory);
}
// more code here
}
B. public class PrefsFactoryInitializer implements ServletContextListener {
public void contextCreated(ServletContext ctx) {
String prefsURL = ctx.getInitParameter("prefsDbURL");
PreferencesFactory myFactory = makeFactory(prefsURL);
ctx.setAttribute("myPrefsFactory", myFactory);
}
// more code here
}
C. public class PrefsFactoryInitializer implements ServletContextListener {
public void contextInitialized(ServletContextEvent e) {
ServletContext ctx = e.getServletContext();
String prefsURL = ctx.getInitParameter("prefsDbURL");
PreferencesFactory myFactory = makeFactory(prefsURL);
ctx.setAttribute("myPrefsFactory", myFactory);
}
// more code here
}
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The safer , easier way to help you pass any IT exams.
D. public class PrefsFactoryInitializer implements ContextListener {
public void contextCreated(ServletContext ctx) {
String prefsURL = ctx.getParameter("prefsDbURL");
PreferencesFactory myFactory = makeFactory(prefsURL);
ctx.putAttribute("myPrefsFactory", myFactory);
}
// more code here
}
Answer: C
13. A developer wants a web application to be notified when the application is about to be shut down.
Which two actions are necessary to accomplish this goal? (Choose two.)
A. include a listener directive in a JSP page
B. configure a listener in the TLD file using the <listener> element
C. include a <servlet-destroy> element in the web application deployment descriptor
D. configure a listener in the application deployment descriptor, using the <listener> element
E. include a class implementing ServletContextListener as part of the web application deployment
F. include a class implementing ContextDestroyedListener as part of the web application deployment
G. include a class implementing HttpSessionAttributeListener as part of the web application deployment
Answer: DE
14. You want to create a filter for your web application and your filter will implement javax.servlet.Filter.
Which two statements are true? (Choose two.)
A. Your filter class must implement an init method and a destroy method.
B. Your filter class must also implement javax.servlet.FilterChain.
C. When your filter chains to the next filter, it should pass the same arguments it received in its doFilter
method.
D. The method that your filter invokes on the object it received that implements javax.servlet.FilterChain
can invoke either another filter or a servlet.
E. Your filter class must implement a doFilter method that takes, among other things, an
HTTPServletRequest object and an HTTPServletResponse object.
Answer: AD
15. Which three are true about the HttpServletRequestWrapper class? (Choose three.)
A. The HttpServletRequestWrapper is an example of the Decorator pattern.
B. The HttpServletRequestWrapper can be used to extend the functionality of a servlet request.
C. A subclass of HttpServletRequestWrapper CANNOT modify the behavior of the getReader method.
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The safer , easier way to help you pass any IT exams.
D. An HttpServletRequestWrapper may be used only by a class implementing the javax.servlet.Filter
interface.
E. An HttpServletRequestWrapper CANNOT be used on the request passed to the
RequestDispatcher.include method.
F. An HttpServletRequestWrapper may modify the header of a request within an object implementing the
javax.servlet.Filter interface.
Answer: ABF
16. Click the Exhibit button.
The resource requested by the RequestDispatcher is available and implemented by the
DestinationServlet.
What is the result?
A. An exception is thrown at runtime by SourceServlet.
B. An exception is thrown at runtime by DestinationServlet.
C. Only "hello from dest" appears in the response output stream.
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