They're not guaranteeing that an applicant is necessarily right for the job, but they do separate the chaff from the wheat proverbially speaking.
This is where we differ. What they separate isn’t chaff from wheat, but those who can do a specific type of interview from those who can’t. The latter aren’t chaff and the former aren’t wheat.
The only time these kinds of questions/tasks are suitable is if they genuinely represent the work being hired for.
Our opinions on this differ, and that’s fine, so whatever works for you.
But then you work with these idiots that can reverse a linked list in other companies and they can't organize code to save their lives. They use patterns and shit they used in facebook everywhere, even when they shouldn't because they always so smart and right.
(yes, after cleaning up code for shitty ex facebookers and ex netflixers, my opinion of the 'wheat' boils down to they may be wheat, but they infested with parasites and bugs and rotten at the core, but hey, what do I know, just been doing sw development for 25+ years, published author and worked on stuff that most here use daily, I'm just chaf because I don't want to work for FANGs)