The interview consisted of 1 question, which was resembling a leetcode question, but actually was an open problem (ie my interviewer did not have a full answer to it). Instead of my ability to code/solve problems the interviewer was curious about my ability to come up with ideas and being able to communicate and discuss them.

Give a 30 minute presentation followed by technical Q&A. Followed by general knowledge questions in your research field, and finally a 30 minute period for two leetcode style coding questions