Did you click the link? I despise these platforms as well, because they're all just timed, algorithmic heavy, dynamic programming tests: almost completely irrelevant to real-world programming, and devilishly difficult to get exactly right. And that's if you studied CS in school and got exposure to this stuff there.
You don't need to test how well people do the easy stuff - even if the easy stuff makes up most of their work - you want to test if they are able to do the difficult parts.
Their programming knowledge tests are very gimmicky questions where you often spend over half the time figuring out how to format the input because everything is read from standard in.
