Honestly, I wish more companies would just tell you in advance of the interview what the specific prompt is going to be (and perhaps the evaluation criteria too). Sure, you could "cheat" by Googling the answer in advance or asking someone for help. But if the question's sufficiently open-ended, it's not that hard to suss out in follow up questions whether you have a deep first principles understanding of the subject…
I'm pretty sure if you give me a subject I know nothing about and a couple days to study I can teach myself about it, at least to the level of someone who has real experience in the subject which may be a couple of years out of use. So then how does a hiring manager know to filter me out?
Presumably, at some point, you'll be interviewed by someone with more up to date experience. And if you study enough to fool that person, that seems fine? It's a good sign you're capable of the job, prior experience be damned.