4 rounds of interview back in 2020. They used to give a HFT book to prepare (Irene Aldridge). After this HR will reach out and give you a maths round, consisting of question from basic algebra to advanced calculus and probability.
Application
I interviewed at Dolat Capital
Interview
Had 3 rounds, including the OT assessment. Basic ML and statistics in the first round. Puzzles were also asked in the first round. Focused more in internship project in the 2nd round.
I applied through college or university. The process took 1 day. I interviewed at Dolat Capital in Dec 2023
Interview
I asked for a puzzle and some stats, tried to confuse, and insisted I was wrong even when right to check my confidence. The puzzle was difficult and there was little time to answer and think.