as far as i know, no... Pretty much anything is possible, regardless of what your using. Some may just may be a little slower or a little harder to code.
yes, anything is possible using asp and php. Because both have a wide number of controls and classes available to perform almost anything.
I don't think so . There are just language difference. Any function can be realized by different (server side) languages . It is just like you can say "hello, world" in 100 different languages.