Taking

Hi, is it safe to take screenshots of OAs (such as Hackerrank, Codility, etc.), or do these websites have any mechanisms to detect if you take screenshots? (don't have enough frontend experience to assess that) I think in the Amazon OA or so they wrote they will notice that - how does that work? Do they just listen for key combinations you press? What if you change the key combination? Are there any ways to circumvent these mechanisms? (besides obviously taking a picture with the phone, which is tedious and leads to worse quality) (I only wanna take screenshots myself to practice the questions afterwards, of course, I don't plan to distribute them).