Studying for your tests or exam is good. But most students believe in this kind of cheating called microchips,mgbò(bullet),nje or supporter.
Some students make the mistake of coming into the exam hall with textbooks.
I know a Professor who does not report you to the School authority when he catches you cheating. Your punishment is this,he will take your "bullet" from you,put inside the answer sheet and tear both. He will give you a new answer sheet. Even if it is 5 minutes to the end of the exam. Lol.