Well, HackerRank is a relatively popular website, he spent a 3 month boot camp working in it, and the ranking system looks to be relatively decent at first glan

Well, HackerRank is a relatively popular website, he spent a 3 month boot camp working in it, and the ranking system looks to be relatively decent at first glance, so I think its reasonable to give him the benefit of the doubt. Edit: HackerRank looks like it measures aptitude more than anything.