I have the onsite for the quantitative research internship next week (the hardest one)

I do not know anything at all about what there will be there because I don't know anyone who did it and information online seems limited to the other internships.

I'm practicing by solving Leetcode, probability problems and reviewing classical ML basics, since those are my best guesses for what would be relevant.

Market is to further motivate myself.

I'm a CS MSc student at a low ranked (top 200) university.