It was four rounds of interview. First, the online test. One simple coding question. One almost hard ML coding question (you couldn't use some toolkits like Pandas, that made it hard). 20 MC questions. and 3 SQL questions. We had 90 mins to finish, but there were too many questions, so It was hard to finish the test on-time. Second, one-hour phone interview with Skype. fundamental and basic ML concepts, like PCA, and regularization, etc. Skype kept disconnecting the voice, so we had to cut the interview in the middle. No hard questions. Third round, on-site (or Skype) technical interview. It took 4 hours. One hour ML coding question. Somehow hard. But they really wanted to see how you code and what you use. it didn't matter if you get a good score or not. After that again 3 interviewers asked basic and fundamental questions. The last person asked kind of open questions to see how you think and look at different problems, that you haven't seen before. The last one, seemed kind of formality. I just met the manager and we talked a little bit about my background and he gave me some advice on the topics that I need to work on. I received the offer after a week.