umm if u do the quests and go to vmk central and one question is wrong, do they still give u the prize? Do they care if its wrong?

It depends on who is checking your quest. Some don't care, and some make you go back and change it.

What they are supposed to do is hand you back the quest and tell you that one of your questions is wrong, they typically won't give the prize for the section you got wrong. Some are nice enough to tell which question you got wrong and a few even give hints and let you try give another answer right there on spot.

im going soon but probably in the summer. I hope i get a nice quest person

Idk..depends. Most of the people let me retry at the booth.