My process: * Make them do a task that is both relevant and realistic with respect to what you do. * Leave 'natural' traps in the task - code problems that ha

My process: * Make them do a task that is both relevant and realistic with respect to what you do. * Leave 'natural' traps in the task - code problems that have tripped you up in the past and see if the candidate falls into the same trap or spots it. * Ask the candidate to clean up their code near the end and watch what they do.