Generally, you cheat for two reasons.
First, because you just refuse to study or read any of the class material, so after ten weeks...you’ve learned nothing.
Second, your professor is a loser, and you can’t learn from the idiot...but he makes these 100-question tests where the answers could be viewed in different fashions.
I had some idiot that a community college had hired for a semester. This individual was a bone-digger for a dinosaur site and the grant money just plain disappeared, and her friends got her this teaching job on geology. I realized twenty minutes into the class that she just basically read from the book and knew almost nothing on geology. She’d spend half of each lecture talking up the act of digging dinosaur bones....which had nothing to do with the class. At the end....I could not imagine how the test would work except for the two-page hand-out she gave the week prior...which had almost every answer listed, and I passed only because I read the hand-out.
I and several others complained to the university. He was fired the next day, the class cancelled, and our tuition for the class was refunded. I didn't bother to take the course again. He was right about the course.