First is a phone screen with a recruiter, then OA, and a final round is 4-hour interview, 45-60 minutes for each one with about 15 minutes break in between, and also a lunch break after the 2nd round. Three rounds include 20 minute intro part, where the interviewer will be asking you questions about your experience, projects, sand testing some overall knowledge. The time that is left is for DSA problem. Round 4 is a system design interview.