you are emailed an Online assessment that contains probability and quick math questions. similar to other interviews that are found online. Pretty straightforward. Then another interview where you talk to a trader and they ask questions (basic probability green book questions)

Prior to the interview there is a mini-lecture series (3 lectures) that goes through trading/options basics. Associated with each lecture is an online quiz you must complete before the next lecture. Top performers in these quizzes are selected for the interview round. They did not disclose their method of determining these top performers.