There is no problem with the make-up exam, which can be easily passed before the start of school. However, if you fail, you will have a chance to take the exam again in the next session. If you fail in too many subjects, you will be demoted. But there is no problem. I will pass the make-up exam before graduation one day. So almost no one can't get a diploma. Don't worry.

I've seen those who have failed and been demoted countless times, and there's nothing wrong with them.