One coding interview 45 mins. Two leetcode medium problem. One research interview 45 mins. All about the research and domain specific problem. Not hard, but one does need to perform well, as there are too many candidates (even just for a intern position).

There was 1 research and 1 coding interview. The research interview consisted of 2 parts: in the first part, they asked questions about my publications, while the second part was a brainstorming session about a research problem.