I'd ask about it because either... a) half the candidates won't know about it and if the company uses it, you'll stick out, or b) the company doesn't use it and won't know what you're talking about (or will have an excuse why they don't use it), so you can know to just run away.
I mean, to me, they're mostly all the same at this point.
I'm disappointed I upvoted that question. I didn't realize it was broken until I was part way through writing an answer.
And if it were just the case of a simple overlook and a minor bug, I'd let it slide. But this bug means that the whole thing simply does not work at all.
No matter the contents of the variables a-e, it will always sort them in that order (by variable name) because I coincidentally created the variables with alphabetic names.
And because by coincidence, they'll almost always end up with ordered memory addresses.
So if you create them coincidentally in a way in which their contents are ordered, then no matter how you stick them in the array, sorting them by memory address and sorting them by contents are the same.
But because my example uses mutable objects, I can change the contents without changing the memory addresses. Attempting to sort again demonstrates that they're being sorted by their memory addresses rather than their contents.