Different forms: written, oral, home exam, seminar, project...
Exam grades: A (best) - B - C - D - E - Fx (completion needed) - F (fail)
One can take re-exam only in case of F, not to improve the grade, following University regulations
Usually, but not a rule, exam period 1 is given at the end of the course; exam period 2 a few weeks after this; and another exam may be offered in August, contact your teacher.
Once you have completed your studies you can apply for your degree certificate. Please note that you will not receive a degree certificate automatically after your studies.