What do you think?

Situation: I am having EOC(End OF Course) Exam. It has 3 parts, and everyday we have to do one part. Now yesterday, i had 15 questions to do, after i was done and out and look at my review sheet, i found out that one of my answer was wrong. And its not allowed to go back an change. When teacher wasn't paying attention today i changed my answer.

Question: You think they photo scanned every single page of every sigle student so if a student don't get caught in class then he will when they rescan it?

Im busted is that happens by the way