TikTok Machine Learning Engineer interview questions

OA after resume screening (for me the OA was generic (includes one rest API, 2 Algo problem, one SQL, one linux), some of my friends got very hard OA which assembles Math competition problems which may due to the positions they applied to), 1+ round of interview ( I got rejected on first round)

Spent the first ~30 minutes on past experiences. The interviewer asked machine learning questions related to my past projects. For the remaining of the time, I was given a medium level leetcode problem.