Application process was generally hard. First you'll get an arithmetic online test that consists of 80 questions and you have to score 54 points to pass. Your score = Number of right questions - Number of skipped/wrong questions. If you pass this round, you'll be invited to the first assessment test meeting that consists of 3 rounds. First round is the same as the online arithmetic test, second round is sequence (this round is hard), and third round is like a mix of the first and second rounds. If you score just right under the passing grade in any of the round, then you'll be put in the 'grey' zone. If you get in the grey zone twice (out of the three rounds), then you fail. I passed the first round but landed in the grey zone for both of the subsequent rounds, which resulted in my getting kicked out. If you want to practice, go to tradertest.org. The sequence test helps but the arithmetic maths test on that site won't help you that much because they don't have fractions, which I find to be the hardest for the first round (the arithmetic online test).

spent about 1.5 months pretty much purely dedicated to preparing for interviews for all the pre-penultimate programs (Optiver, IMC, JS, SIG, Citadel, etc). I used these resources: Green book (Really good starter but I got bored of it after a few weeks) EverythingQuant (Went through literally every single interview prep question, went through the interview guides, and completed the probability course just to make sure I covered all bases) Briefly read through this guide Watched coding Jesus in my spare time (not sure if this helped directly lmao but he’s a great creator and very informative)