I worked at a unicorn that did these type of interviews under the premise that they provided a way to reduce bias in the process. That seems reasonable if you b

I worked at a unicorn that did these type of interviews under the premise that they provided a way to reduce bias in the process. That seems reasonable if you believe that qualified engineers can walk in and compete these tasks without having practiced extensively. I don’t happen to believe that and thus believe it biases in favor of candidates who can devote considerable quantities of free time to preparation.