Earlier quoted context omitted.
At least it is better than getting asked questions about the O-notation of the solution you've just whiteboarded. There has to be a better way...
What's wrong with that? Big-O notation is fairly universally relevant so it seems not unreasonable to expect a programmer to be able to talk about it a little. I've seen exactly that be a strong indicator in the past - a candidate not being able to recognise that the code he'd written ran in O(n^2) was a significant negative sign.
To the downvoters: Do you disagree? If so please tell me why.