You'd better ask someone in your school. Maybe every school has a different system. But it is generally possible. Some schools have no chance to retake the exam if the score is lower than how many points, so they can only retake the exam. Some can make-up exams. But don't worry, it doesn't matter even if there is no make-up exam. There is no make-up exam this time, and there will be another chance next time. There will be a backlog of exams before graduation. Any course you haven't studied in recent years will make you take this exam and pass it easily … so don't worry.