Your post assumes that programmers are always applying for well paying jobs at great companies and have a great chance at any position they do this homework for

Your post assumes that programmers are always applying for well paying jobs at great companies and have a great chance at any position they do this homework for. Realistically, there are 50-100 people applying for every position in the US, many of whom are qualified. So 50 devs are going to do a day of homework, doing two months of collective work? And then you have to do it again for every other job you apply for? Get outta here!