When my mentor was going through MANAMANA interviews a several months back for senior/staff DS/MLE positions, he was getting mostly mediums and a handful of hards.

With a few exceptions, I generally can't solve hard leetcode problems. It never even occurred to me to feel bad about it! I've been a working programmer for 25 years, including many years at Microsoft and Facebook. I'm certain I've never encountered a problem at work that needed a 'hard' style solution, and if I hypothetically had, I don't even know how it would pass code review.

I've solved almost all of the easy and mediums, though.

I recently changed jobs (also interviewed at FB, though I didn't do well) and none of the interview questions were at LeetCode hard level.

There was maybe one question that I'd say was objectively hard (because it was completely unexpected and blew my mind - fortunately I did it OK) - but I don't think practicing LeetCode hard level would've helped there anyway. And then several questions were barely above LeetCode easy level and I had a brain fart. (Should have practiced binary trees a bit more, dammit.)

IMHO LeetCode hard level is a waste of time, unless you know for sure that the company you're preparing for gives these questions.

Hard level are really rare in FAANG, based on my friend who recently went through Google interviews. More like easy/medium. It actually sounded fairly easy to me, he only prepped for a month without any prior leetcode experience. I think finance tend to ask the medium/hard questions more so.

Don't know about FB specifically, but in Bezosland they apparently are, according to this proud Amazonian, at least:

https://www.teamblind.com/post/I-always-ask-leetcode-hard-7S...

Smells like a troll - but perhaps only "partially" so.