Google

4 rounds. First round, the question was very confusing, and the interviewer refused to explain it. Second was a hashtables-based question. Third was ML & system design. Fourth was on Googleyness.

Phone interview and then a call with a coding test. Pay attention to code; you can find it at LeetCode, where examples are provided for the codes you can use.

5 rounds: The first round can be described as having one easy to average question. The focus is mainly on syntax following, program comprehension, and logic building. Complexity analysis and different approaches for the same will also be asked.