I had one online screening process where a coding question was asked on a video call along with basic statistics question and a simple ML Design question. After I cleared that round, I had two 45 minute interviews on ML design and Statistics.
Interview questions [1]
Question 1
Leetcode Coding question from top frequency problems
I applied online. The process took 1+ week. I interviewed at Meta
Interview
Was qualified for round 2 (coding) interview right away. The coding question wasn't hard but I got stuck and the interviewer was really unwilling to discuss anything. The probability question was confusing too. The ML question was ok (classification with random forest).
I applied online. The process took 3 weeks. I interviewed at Meta (Seattle, WA) in Mar 2020
Interview
Remote VC screens technical, then coding, then a day of six onsite interviews an hour long each and an hour long presentation preceding that. Very clear process, good enthusiasm exhibited by all parties concerned.