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.
您可能感興趣的試卷
你可能感興趣的試題
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）
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
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 fixthese problems would require significant recoding， but you are already behind schedule.
Which JSP codesnippet can you use to resolve these concurrency problems？（）
A.<%@ page isThreadSafe=’false’ %>
B.<%@ implements SingleThreadModel %>
C.<%! implements SingleThreadModel %>
D.<%@ page useSingleThreadModel=’true’ %>
E.<%@ page implements=’SingleThreadModel’ %>
A.Config
B.Request
C.Session
D.Application
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？（）
Click the ’Select and Place’ button.Place the events in the order they occur.
Which element of a web application deployment descriptor element is required？（）
A web application allows the HTML title banner to be set using a servlet context initialization parametercalled titleStr.Which two properly set the title in this scenario？（）
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？（）
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？（）
You are building a web application with a scheduling component. On the JSP， you need to show the currentdate， the date of the previous week， and the date of the next week. To help you present this information，you have created the following EL functions in the ’d’ namespace： name： curDate； signature： java.util.DatecurrentDate（） name： addWeek； signature： java.util.Date addWeek（java.util.Date， int） name： dateString；signature：java.util.String getDateString（java.util.Date）Which EL code snippet will generate the string for the previousweek？
Click the ’Select and Place’ button.Place the events in the order they occur.
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.