There are four round in total: 1 code (leetcode easy level) 2 ML concept (focus on fundamental traditional ML stuff) 3 ML system design 4 BQ and project NDA signed for last two rounds. But the recruiter will tell you the expected topic

The phone screen was surprisingly short, only about 20 minutes, focusing on my background and some general ML concepts. Then came the technical round where I had to design a ranking model for Instacart’s search results. Midway through, it hit me that I had just practiced a very similar problem on PracHub, which made me feel a bit more confident. However, the depth of the discussion, especially around metrics and cold-start items, was intense. In the end, I didn’t receive an offer, but it was a decent experience overall.