Meta Research Scientist I interview questions

One round of screening and onsite consisting of four interviews: 2 coding interviews, 1 research + coding interview, 1 system design interview. Each coding interview asked two leetcode questions within 45 minutes. The question difficulties are medium~hard leet code questions. The design interview was difficult as I was not familiar with it. It asked some kind of designing a system of Uber/Lyft.

they asked two coding questions, how do you understand the question and using your familiar programming language to solve the problem. There are two rounds of coding interview. Each round contains two questions.