I've coined a term for these FANGA interviews: Epiphany Lottery. You need to come up with the correct answer in less than 2 minutes, twice, within 45 minutes.

I've coined a term for these FANGA interviews: Epiphany Lottery. You need to come up with the correct answer in less than 2 minutes, twice, within 45 minutes. Because it runs twice, you will only have 15 minutes to write up the code to handle all the edge cases your solution can't cover for. There is simply no time, nor expectation, for the candidate to reason about a problem and actually work out a solution. And that's for a single interview slot.