Coding interviews were mostly algorithms+coding without any reference or reliance on my prior experience. Newly grad that prepared well could have passed this type of questions. Of course, a lot of "signal" is gathered by how you approach the problem, your communication and pace. System design was around getting a very high level requirement for a system, required analyzing the problem, asking the right questions and proposing a solution. Part of the interview was to check my general sense of "engineering numbers" (e.g. how many such requests would you expect a single machine could handle?). Leadership interviews were mostly around my past experience, using examples of building teams, leading projects, dealing with low performers, etc.
