Nothing is wasted if you've tried your best. Many exams are graded subjectively and there's no reason for you to punish yourself over it. Besides, you have retained valuable information while studying and you can always take the exams again, that time with more knowledge on what will be taken up.
2) The exam could out you as a phony, exposing gaps in your education.
3) You should have studied everything.
b. Read about topics he has assigned as homework.
c. Take note of items he has written on the blackboard, such as terms, names, formulae, or dates. If they were written down, they're likely to be included. d. If your teacher tells you that a particular topic will be included in the exam, there's a 99% chance that it will.
4) If you haven't understood what you have read, there's no use taking the exam.
University is so much different than high school in that there's a large volume of information you have to learn about in so little time. Because of this, it's highly unlikely that you would be able to comprehend each topic fully. When examination time comes around, it's only normal that there is a huge percentage of information that you don't really understand. What's important is for you to ask your teacher or classmates for clarification if you still have the time. If not, take the exam anyway – half your classmates probably don't know it all, either - just remember to have the subject matter explained to you after the exam so it will add to your stock knowledge.
5) The exam questions are not easily understandable.
6) Exams are for people with good memories.
7) Exams are just for people who work extremely fast.
8) Calculations are either right or wrong.