I'm pretty sure that the technical tests for FAANG are just to prove that you'll bust your ass doing trivial bullshit for them / and that you're a sucker -- instead of actual meaningful skill checks. Is this guy a total sucker who will drink our Koolaid when it's time? Are they wearing Nike? Yes. This is going to be a good investment.

I was down and out once and got a job a Micheal's Art and Crafts store. The application was clearly a mindfuck test. It asked, "If your boss was stealing - would you report them?" BTW - the answer is "No." You only report people below you. I answered in the way I knew the computer wanted me to - and I got the job. Same shit.

Are you subordinate? You're hired.

Something that cracks me up is how a lot of these companies come up with dumb names for their employees. Hello, fellow amazonian/googler/nutsucker, it is a great day to praise our glorious leader and make him richer, don't you think?

Although I see yours and @ars1 's interpretation that they look for someone who will sieg hail their glorious leader at every goose-step as absolutely correct, there is one minor useful objective feature of stupid tests:
- They are basically advanced CAPTCHAs

Seriously, big global tech brands receive so many applications that they need a way for automatically filter out 97% (or more) of those. And the most important question is "can you read medium sized stuff, think about it, and then answer?". A computer can't evaluate a direct answer for this question, but some stupid puzzles might make the answer just palatable enough for a machine to parse.

I once had to manually regect a dozen applicants who answered something like "I want very be silicon valley I good I play computer and Facebook! 'I computer good' money now please" to the question "what is your most important past experience".
If those could just be sorted by "how well can you solve a rubik cube", it might save me some time.