That would be true if everyone wasn't also asking the same questions. So you are just testing whether the person knows that you ask that question or has interviewed at other places that do (I have seen this in other industries too: firm adopts some "interview technique", no women get through, no under-represented groups get through, they are baffled but put it down to their process being a completely objective identifier of innate genius...kind of ignoring that some of these places are hiring tens of thousands of people who, by definition, aren't geniuses...people are weird).