One Interview Question for Job Seekers in Finance

I presented in an earlier post that I was mostly disillusioned with interview questions, it’s better to find out if you can learn something out of a candidate.Well there is maybe one very simple question that could be revealing, for people who pretend to be vaguely familiar with Black-Scholes:What is the price of an at-the-money binary option under very high volatility? Alternatively it can be asked with just an at-the-money european option under very high volatility.