I voted only if they failed in other classes. Not everyone can take tests. My middle daughter isn't good at testing. She freezes up. She can answer almost every question with 100% accuracy if asked by the teacher, but when it comes to tests, she just freezes up.
Exit exams, in my opinion, should only be given if the student failed everything else. Otherwise it's just an unnecessary expense, and something else to make the kids worry about. They have already got enough to worry about.