The interviewer just asked random questions of physics and all at starting that made me nervous. But he was friendly also explained the thingsgs that I didn't know. I thought they will ask ml related question. But I was wrong at that point of time.

The interview was quite easy if you're well versed in general Machine learning, statistics and Python libraries like Scikit learn, pandas, numpy, etc. I was asked questions on this topic apart from this most of the interview also revolved around my project.