A good question for ppl in the coding challenge camp. What new information do you neeed from a coding challenge that you don't get talking shop with the indivi

A good question for ppl in the coding challenge camp. What new information do you neeed from a coding challenge that you don't get talking shop with the individual? I don't think low level technical stuff is something you can BS your way through an interview. If it works on you, then you as an interviewer has major gaps