nus cs undergrad program is goodand has a quite nice fame :) IS too, probably better. not very sure about ce or ntu programs, though. however i think that should be a concern only if u can be a top student. o/w whether the program is famous or what would not make much difference for you. I dun think previous computer or programming experience is a requirement. while it's a plus to some extend, without hard working it definitely won't help u much. one thing extra.. i feel that the first year is vital. so try to perform as good as u can :)