We'd turn on a dime and ask them to tell us about their merkle tree hacking on the white board, and the poke at it. The goal is to get a sense of people's skill

We'd turn on a dime and ask them to tell us about their merkle tree hacking on the white board, and the poke at it. The goal is to get a sense of people's skill, and we need to understand that they're not regurgitating something they've memorized ahead of time. Someone we interviewed last week was hoping for fizzbuzz and couldn't answer an equally simple question!