You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version 3.5. 
You create a Web form by using ASP.NET AJAX. 
You write the following client-script code fragment to handle the exceptions thrown from asynchronous 
postbacks. （Line numbers are included for reference only.） 
01 <script type="text/javascript"> 02 function pageLoad（） 
03 { 
04 var pageMgr = 
05 Sys.WebForms.PageRequestManager.getInstance（）； 
06 
07 } 
08 
09 function errorHandler（sender， args） 
10 { 
11 
12 } 
| English | Chinese | Japan | Korean | - 146 - Test Information Co.， Ltd. All rights reserved. 13 </script> 
You need to ensure that the application performs the following tasks： &iexcl；¤Use a common clien-script function named errorHandler. &iexcl；¤Update a Label control that has an ID named lblEror with the error message. &iexcl；¤Prevent the browser from displaying any message box or Javascript error 
What should you do？ （）

单项选择题You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version 3.5.  You write the following code segment to create a client-script function. （Line numbers are included for reference only.）  01 function updateLabelControl（labelId， newText） {  02 var label = $find（labelId）；  03 label.innerHTML = newText；  04 }  The client script function uses ASP.NET AJAX and updates the text of any Label control in the Web form.  When you test the client script function， you discover that the Label controls are not updated. Youreceive  | English | Chinese | Japan | Korean | - 145 - Test Information Co.， Ltd. All rights reserved. the following JavaScript error message in the browser：  ’null’ is null or not an object.  You need to resolve the error.  What should you do？（）

A.A
B.B
C.C
D.D

单项选择题You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version 3.5.  You write the following code segment to create a client-script function. （Line numbers are included for  | English | Chinese | Japan | Korean | - 144 - Test Information Co.， Ltd. All rights reserved. reference only.）  01 function updateLabelControl（labelId， newText） {  02 var label = $find（labelId）；  03 label.innerHTML = newText； 04 }  The client script function uses ASP.NET AJAX and updates the text of any Label control in the Web form.  When you test the client script function， you discover that the Label controls are not updated. You receive the following JavaScript error message in the browser：  ’null’ is null or not an object.  You need to resolve the error.  What should you do？（）

A.A
B.B
C.C
D.D

单项选择题You create a Microsoft ASP.NET Web application by using the Microsoft .NET Framework version 3.5.  You add the following code fragment to an AJAX-enabled Web form. （Line numbers are included for reference only.）  01 <asp：ScriptManager ID= scrMgr  runat= server   >  02 <asp：UpdatePanel ID= updPanel  runat= server   03 UpdateMode= Conditional >  04 <ContentTemplate>  05 <asp：Label ID= lblTime  runat= server   >  06 <asp：UpdatePanel ID= updInnerPanel   07 runat= server  UpdateMode= Conditional >  08 <ContentTemplate>  | English | Chinese | Japan | Korean | - 143 - Test Information Co.， Ltd. All rights reserved. 09 <asp：Timer ID= tmrTimer  runat= server   10 Interval= 1000   11 OnTick= tmrTimer_Tick   >  12 < ContentTemplate>  13  14 < asp：UpdatePanel>  15 < ContentTemplate>  16  17 < asp：UpdatePanel>  The tmrTimer_Tick event handler sets the Text property of the lblTime Label control to the current time of the server.  You need to configure the appropriate UpdatePanel control to ensure that the lblTime Label Control is properly updated by the tmrTimer Timer control. What should you do？（）

A.A
B.B
C.C
D.D

单项选择题You create a Microsoft ASP.NET Web application by using the Microsoft .NET Framework version 3.5.  You add the following code fragment to an AJAX-enabled Web form. （Line numbers are included for reference only.）  01 <asp：ScriptManager ID= scrMgr  runat= server   >  02 <asp：UpdatePanel ID= updPanel  runat= server   03 UpdateMode= Conditional >  04 <ContentTemplate>  05 <asp：Label ID= lblTime  runat= server   >  06 <asp：UpdatePanel ID= updInnerPanel   07 runat= server  UpdateMode= Conditional > 08 <ContentTemplate>  09 <asp：Timer ID= tmrTimer  runat= server   10 Interval= 1000   11 OnTick= tmrTimer_Tick   >  12 < ContentTemplate>  13  14 < asp：UpdatePanel>  15 < ContentTemplate>  16  17 < asp：UpdatePanel>  The tmrTimer_Tick event handler sets the Text property of the lblTime Label control to the current time of  | English | Chinese | Japan | Korean | - 142 - Test Information Co.， Ltd. All rights reserved. the server.  You need to configure the appropriate UpdatePanel control to ensure that the lblTime Label Control is  properly updated by the tmrTimer Timer control.  What should you do？（）

A.A
B.B
C.C
D.D

单项选择题You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version 3.5.  You write the following code fragment. （Line numbers are included for reference only.）  01 <asp：UpdatePanel ID= upnData  runat= server   02 ChildrenAsTriggers= false  UpdateMode= Conditional >  03 <Triggers>  | English | Chinese | Japan | Korean | - 140 - Test Information Co.， Ltd. All rights reserved. 04  05 < Triggers>  06 <ContentTemplate>  07 <!-- more content here -->  08 <asp：LinkButton ID= lbkLoad  runat= server  Text= Load   09 onclick= lbkLoad_Click   >  10 <asp：Button ID= btnSubmit  runat= server  Text= Submit  11 Width= 150px  onclick= btnSubmit_Click   >  12 < ContentTemplate>  13 < asp：UpdatePanel>  14 <asp：Button ID= btnUpdate  runat= server  Text= Update   15 Width= 150px  onclick= btnUpdate_Click   >  You need to ensure that the requirements shown in the following table are met.  What should you do？ （）

A.A
B.B
C.C
D.D