from my personal experience as a student, what seemed to help reduce cheating was 1.) honeycombs on cheggso if you use the answers there it's obvious, 2.) hard

from my personal experience as a student, what seemed to help reduce cheating was 1.) honeycombs on cheggso if you use the answers there it's obvious, 2.) hard time limits so it's harder to coordinate cheating, 3.) large question pools