Asynchronous Web Page Programming in 70-528

Asynchronous Web Page Programming is explained in little more then a few
sentences in the self paced course. These sentences are misty to me. Can
somebody tell if Asynchronous Web Page Programming is an important subject,
in the exam, in real life programming.

If so, I will try to do some further reading on it, besides the self paced
course from Northrup and Johnson.

 

Here's a good article written by Jeff Prosise and published in the MSDN
Magazine:
http://msdn.microsoft.com/en-us/magazine/cc163725.aspx

and here's a related MSDN link:
http://msdn.microsoft.com/en-us/library/system.web.begineventhandler.aspx

Don't spend too much of time on it.