Question:What is Microsoft AJAX Library? 

The Microsoft AJAX Library is actually written in JavaScript. It is a set of files that are sent to the browser to provide a base of capabilities on which we can build. ScriptManager control automatically injects these scripts into the page markup when needed.

Question:Name all AJAX client-side life cycle events? 

AJAX client-side life cycle events:
1. initializeRequest
2. beginRequest
3. pageLoading
4. pageLoaded
5. endRequest