Meta Machine Learning interview questions

Recruiter reached out to me first. Two-round of phone screens are scheduled. However, after that I was told the positions were filled. So they even cannot told me if I had passed the interview or not. The engineers I met in the interviews are really nice. But the recruiter sucks.

After an internal referral, a recruiter contacted me to have two phone interviews. The first phone interview went easy with a binary tree path problem and a search problem. The second phone interview was ok with a sorting problem and a random sampling problem. Overall, the questions are easy to medium coding level, but demand a high accuracy and solid background of basic data structure and algorithms.