Question:You are working on a long data-entry webpage. In the middle of the page, you need to reach out to the server to get information based on a user’s entry for a related field. However, you do not want the user to lose his or her focus or context within the page. Therefore, you decide to implement this feature by using the ASP.NET AJAX controls.
Which of these controls must you add to the page to enable this scenario? (Choose all that apply.) 

A UpdatePanel 
B AsyncPostBackTrigger 
C ScriptManager 
D ScriptManagerProxy 

+ Answer
A C 

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Mohammad Towhidul Islam

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