The First round is a paper-and-pen skill test, which covers probability theory, statistics, portfolio theory, and computational skills. Every question starts with every basic ones, and gets harder towards the end. The time is 90 minutes, a bit tight if you spend too much time on the difficult questions. The best strategy might be tackling the easy ones first and come back for the difficult ones.

The interview process was quite fast, I did an initial technical exam on math and coding, then had an another technical interview where they asked math, machine learning and programming question.