Meta Research Scientist interview questions

Code screen was code signal and pretty standard: 2 super easy questions then 2 harder questions, one about memory allocation and 1 array based problem. They weren't easy but the problems weren't hard to understand and i dont believe they had hidden test cases

4 full loop rounds: classic coding, AI-enabled coding, system design and behavioral interview. The interviewers seemed like they didn't want to do the interviews from the first, and I felt I was wasting their time.