I hate those things so much. Amazon almost solely uses them and it's not even a conversation - just a sequence of "tell me about a time when you failed" with every word of response typed into their laptops.

I had a phone interview yesterday which I presumed would be all about what I've done and how I could do the job. The hiring manager was ex-Amazon (surprise!) so it was a litany of "tell me about"s instead.

In the Amazon case, at least one can look at the Bezos Commandments ("The Leadership Principles"(tm)) and mock up answers in advance - twice to take care of double asks. It's hard to predict by comparison what some random is going to use.