Yep - looking up answers as a Computer Whiz counts as an exam cheat, and you can get caught.
Chances of getting caught are much, much lower for high-rank Rebels.
Best way not to get caught, however, is not to cheat at all. So long as your Academic Performance meter is full going in to the exam, you won't need to cheat. You can count on passing the exam "with flying colors", and will keep the Dean's List moodlet through the weekend.