Probably during the interview before even giving them a take home test. If someone is going to cheat on a take home test they will probably expose themselves wi

Probably during the interview before even giving them a take home test. If someone is going to cheat on a take home test they will probably expose themselves with even a shallow inquest into their knowledge. That's why you need a trusted competent dev in the interview with you. The take home test gives you a clearer idea of their problem solving skills, but you should probably trust that they know how to write software before getting to that point.