Hi, I think it would be extremely beneficial if students could leave comments on their quiz/exam questions.
This is a great idea, and there is currently a very similar version of your idea open for voting at Like button for questions in quizzes.
Check it out, and if this is what you are looking for, let me know and we will archive your idea to avoid duplication.
I believe that these are two different ideas. I think that having a like button is different from having an area for students to leave comments about questions or answers. I hope this helps!
Retrieving data ...