[umami]

Here it is presented as a question used by Referly. But for historical accuracy; weren't early Google interviews famous for using this question years ago?

[kevin_morrill]

I heard about this questions while working at Microsoft in 1998, before Google existed. I am sure someone was asking it even before Microsoft existed.

[hammock]

Per the discussion I linked, Google used it; it was also used before that by Microsoft and Novell.