Meta Research Scientist interview questions

This was for a software engineering role, the title reflects phd. initial coding, 2 more coding, ml system design, behavioral. coding is leetcode. initial coding has 1 question, the rest have 2 questions each. you don't run the code but have to explain step by step the solution.

Total 5 round. First was screening with 2 leetcode medium. Then Additional 4 rounds on two separate days. 2 LC medium, 1 BQ, and 1 ML. All questions were easy to medium.