Okay, so now interviewers will have to run their own copy and compare their answers to yours on real-time. Wonderful. Let the adversarial games commence!
If you ask ChatGPT the same question in different context sessions, you get vastly different answers each time. So that would not only give you lots of false negatives, but could also give false positives of people who are legit doing it and happen to come up with the same solution that GPT did.
Indeed possible. That's partly why the prompt chain is set up to build a 'cheat sheet' type of answer, instead of a fully-formed answer that can be repeated verbatim.