You want to create a filter for your web application and your filter will implement javax.servlet.Filter.
Which two statements are true？（）
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 doFiltermethod.
D.The method that your filter invokes on the object it received that implements javax.servlet.FilterChaincan invoke either another filter or a servlet.
E.Your filter class must implement a doFilter method that takes， among other things， anHTTPServletRequest object and an HTTPServletResponse object.
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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？（）
A.Include a listener directive in a JSP page
B.configure a listener in the TLD file using the
C.Include a
D.configure a listener in the application deployment descriptor， using the
E.Include a class implementing ServletContextListener as part of the web application deploymen
Servlet A receives a request that it forwards to servlet B within another web application in the same webcontainer. Servlet A needs to share data with servlet B and that data must not be visible to other servlets inA’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
The sl：shoppingList and sl：item tags output a shopping list to the response and are used as follows：
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 castingthe result to ShoppingListTag.
B.ShoppingListTag can find the child instances of ItemSimpleTag by calling super.getChildren（） andcasting each to an ItemSimpleTag.
C.It is impossible for ItemSimpleTag and ShoppingListTag to find each other in a tag hierarchy becauseone is a Simple tag and the other is a Classic tag.
D.ShoppingListTag can find the child instances of ItemSimpleTag by calling getChildren（） on thePageContext 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.
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 pageContextobject，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）
最新試題
You need to create a JSP that generates some JavaScript code to populate an array of strings used on the client-side.Which JSP code snippet will create this array？（）
You are building a dating web site. The client’s date of birth is collected along with lots of other information.The Person class has a derived method， getAge（）：int， which returns the person’s age calculated from thedate of birth and today’s date. In one of your JSPs you need to print a special message to clients within theage group of 25 through 35.Which two EL code snippets will return true for this condition？ （）
Click the ’Select and Place’ button.Place the events in the order they occur.
In which three directories， relative to a web application’s root， may a tag library descriptor file reside whendeployed directly into a web application？（）
Given tutorial.jsp：2.EL Tutorial3.Example 14.5.Dear ${my：nickname（user）}6.Which， when added to the web application deployment descriptor，ensures that line 5 is included verbatimin the JSP output？（）
Click the ’Select and Place’ button.Place the events in the order they occur.
Your IT department is building a lightweight Front Controller servlet that invokes an application logic objectwith the interface：public interface ApplicationController {public String invoke（HttpServletRequest request）}The return value of this method indicates a symbolic name of the next view. From this name， the FrontController servlet looks up the JSP URL in a configuration table. This URL might be an absolute path or apath relative to the current request. Next， the Front Controller servlet must send the request to this JSP togenerate the view. Assume that the servlet variable request is assigned the current HttpServletRequestobject and the variable context is assigned the webapp’s ServletContext.Which code snippet of the FrontController servlet accomplishes this goal？（）
You are building a dating service web site. Part of the form to submit a client’s profile is a groupIIof radio buttons for the person’s hobbies：20.<input type=’radio’ name=’hobbyEnum’ value=’HIKING’>Hiking <br>21.<input type=’radio’ name=’hobbyEnum’ value=’SKIING’>Skiing <br>22.<input type=’radio’ name=’hobbyEnum’ value=’SCUBA’>SCUBA Diving23.<!-- and more options -->After the user submits this form， a confirmation screen is displayed with these hobbies listed. Assume thatan application-scoped variable， hobbies， holds a map between the Hobby enumerated type and the displayname.Which EL code snippet will display Nth element of the user’s selected hobbies？（）
The JSP developer wants a comment to be visible in the final output to the browser.Which comment styleneeds to be used in a JSP page？（）
Click the ’Select and Place’ button.Place the events in the order they occur.