4 Questions in the OA, LC Medium. (Technically it was the general CodeSignal assessment so if you took it for other companies you can just transfer it). Recruiter Phone Screen was simply a call to talk about resume, role, if you had any questions. Then first round interview had a "technologist conversation" which was a conversation partially about resume and then a high level discussion of technical details of Operating Systems. It also had a Technical Interview of reimplementing a vector in C++.