From the statement, it appears the writer isn't confident about himself and what he can deliver with his brains. When studying for an exam, the first principle is to understand your subjects then you can now proceed to plan how you will pass your exam.
For you to do well in your exam, you must avoid the "fire brigade" approach of trying to cram everything 1 week to the exam. As soon as a semester starts, you have to start studying and making research to understand the subject area. This will build up your memory and help you to visualize any questions that come up in your exams.
As a rule of thumb, before any exam starts, make sure that you must have read your books over again more than 2 - 3 times and leave no stone unturned.
Lastly, as i said in the first line, your confidence in exam hall must be firm. Believe in yourself first. The thought of spying, cheating or even bribing a lecturer is a pointer that you lack confidence in your self.
I hope i have been able to advice you well enough. 🙏🏾