The solution is like the blog author's (maybe it was a different blog I read this morning): practice interview questions. Study for the exam.

Yeah, I can do that. Mmmm. And maybe I pass. But other companies won't make me do that...

So, if the aim was screening for people that want to work for Google above all else, then, yes, the screening totally works. But... Google would downsize you and your project coldly if there were financial reason to do so, so...