Monday, 21 September 2015

Frequently Asked AJAX Interview Questions and Answers

31. What is prerequisite for Update Panel in Ajax?
Script Manager is pre-requisite to use Update Panel controls.

32. How many update panel can be used per page?
There are no restrictions on the number of update panels per page.

33. What is Script Manager?
Script Manager helps manage the client side script of AJAX. Script Manager acts as a mediator as AJAX depends on JavaScript. Every page that uses AJAX has a Script Manager to enable AJAX libraries.

34. How Ajax objects can be created?
Following syntax can be used to create Ajax objects:
Var sample = New ajaxObject(‘path of the page’)

35. What are the protocols used by Ajax?
    HTTP’s GET or POST
    XMLHttpRequest for placing a request with the web server
    Uses JSON to communicate between the client and server
    UED or URL encoded data

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