SUN Sun Certified Web Component Developer for J2EE 5 : 310-083 Exam Questions

Assume the custom tag my:errorProne always throws a java.lang.RuntimeException with the message "File not found."
An error page has been configured for this JSP page.
Which option prevents the exception thrown by my:errorProne from invoking the error page mechanism, and outputs the message "File not found" in the response?

• A. <my:errorProne>
  < c:catch var="ex">
  $ {ex.message}
  < /c:catch>
  < /my:errorProne>
• B. <c:try>
  <my:errorProne />
  <c:catch var="ex" />
  ${ex.message}
  </c:try>
• C. <c:catch var="ex">
  < my:errorProne />
  < /c:catch>
  $ {ex.message}
• D. <c:try>
  < my:errorProne />
  < /c:try>
  < c:catch var="ex" />
  $ {ex.message}
• E. <c:try catch="ex">
  < my:errorProne />
  < /c:try>
  $ {ex.message}

Which two from the web application deployment descriptor are valid? (Choose two.)

• A. <error-page>
  < exception-type>java.io.IOException</exception-type>
  < location>/error.html</location>
  < /error-page>
• B. <error-page>
  < exception-type>java.lang.Throwable</exception-type>
  < location>/error.html</location>
  < /error-page>
• C. <error-page>
  < exception-type>*</exception-type>
  < location>/error.html</location>
  < /error-page>
• D. <error-page>
  < exception-type>NullPointerException</exception-type>
  < location>/error.html</location>
  < /error-page>
• E. <error-page>
  < exception-type>java.lang.Error</exception-type>
  < location>/error.html</location>
  < /error-page>

You need to retrieve the username cookie from an HTTP request. If this cookie does NOT exist, then the c variable will be null. Which code snippet must be used to retrieve this cookie object?

• A. 10. Cookie c = null;
  1 1. for ( Iterator i = request.getCookies();
  1 2. i.hasNext(); ) {
  1 3. Cookie o = (Cookie) i.next();
  1 4. if ( o.getName().equals("username") ) {
  1 5. c = o;
  1 6. break;
  1 7. }
  1 8. }
• B. 10. Cookie c = request.getCookie("username");
• C. 10. Cookie c = null;
  1 1. Cookie[] cookies = request.getCookies();
  1 2. for ( int i = 0; i < cookies.length; i++ ) {
  1 3. if ( cookies[i].getName().equals("username") ) {
  1 4. c = cookies[i];
  1 5. break;
  1 6. }
  1 7. }
• D. 10. Cookie c = null;
  1 1. for ( Enumeration e = request.getCookies();
  1 2. e.hasMoreElements(); ) {
  1 3. Cookie o = (Cookie) e.nextElement();
  1 4. if ( o.getName().equals("username") ) {
  1 5. c = o;
  1 6. break;
  1 7. }
  1 8. }

You are creating a JSP page to display a collection of data. This data can be displayed in several different ways so the architect on your project decided to create a generic servlet that generates a comma-delimited string so that various pages can render the data in different ways. This servlet takes on request parameter: objectID. Assume that this servlet is mapped to the URL pattern: /WEB-INF/data.
In the JSP you are creating, you need to split this string into its elements separated by commas and generate an HTML <ul> list from the data.
Which JSTL code snippet will accomplish this goal?

• A. <c:import var='dataString' url='/WEB-INF/data'>
  < c:param name='objectID' value='${currentOID}' />
  < /c:import>
  < ul>
  < c:forTokens items'${dataString.split(",")}' var='item'>
  < li>${item}</li>
  < /c:forTokens>
  < /ul>
• B. <c:import varReader='dataString' url='/WEB-INF/data'>
  < c:param name='objectID' value='${currentOID}' />
  < /c:import>
  < ul>
  < c:forTokens items'${dataString}' delims=',' var='item'>
  < li>${item}</li>
  < /c:forTokens>
  < /ul>
• C. <c:import varReader='dataString' url='/WEB-INF/data'>
  < c:param name='objectID' value='${currentOID}' />
  < /c:import>
  < ul>
  < c:forTokens items'${dataString.split(",")}' var='item'>
  < li>${item}</li>
  < /c:forTokens>
  < /ul>
• D. <c:import var='dataString' url='/WEB-INF/data'>
  < c:param name='objectID' value='${currentOID}' />
  < /c:import>
  < ul>
  < c:forTokens items'${dataString}' delims=',' var='item'>
  < li>${item}</li>
  < /c:forTokens>
  < /ul>

The sl:shoppingList and sl:item tags output a shopping list to the response and are used as follows:
1 1. <sl:shoppingList>
1 2. <sl:item name="Bread" />
1 3. <sl:item name="Milk" />
1 4. <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 findAncestorWithClass() on the PageContext and casting the result to ShoppingListTag.
• B. ShoppingListTag can find the child instances of ItemSimpleTag by calling getChildren() on the PageContext 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. ItemSimpleTag can find the enclosing instance of ShoppingListTag by calling getParent() and casting the result to ShoppingListTag.
• E. ShoppingListTag can find the child instances of ItemSimpleTag by calling super.getChildren() and casting each to an ItemSimpleTag.