In my understanding, Facebook and Google have centralized interviewing, whereas at Apple each team did its own hiring (my team of ~40 had their own recruiter, did all their own interviews, etc.). Amazon I believe is similar to Apple but the teams are larger? When I interviewed there it was all for the ads org, and there weren't people from other parts of Amazon.

I actually had quite the opposite experience, Apple absolutely grilled me at the spot for its interview, even though I did pass it, but I didn't take their offer.

They definitely grilled me... It's just that they actually had humans talk to me and answer questions, not just throw a website with an automated judge and intentionally confusing problems. (My first language isn't English)

Facebook was very robotic in their process, with a lot of demands for preparation. Google and Amazon aren't that far off.

> just throw a website with an automated judge and intentionally confusing problems

Who did that??? Never heard of automated tests

Amazon did: https://news.ycombinator.com/item?id=13076821

I think Google and Facebook does that for some interns.