I used to think that, but you'd honestly be surprised how many people it filters out successfully. It is just an advanced version of FizzBuzz : even if it's no

I used to think that, but you'd honestly be surprised how many people it filters out successfully. It is just an advanced version of FizzBuzz : even if it's not enough to determine whether someone is good or not, it definitely burns people that are not able to code at all. It also provide talking points for the interview afterward about coding style and all. Of course, it's not sufficient, but it's just a stage among others if the interview is done correctly, and it's a useful one