Interview on campus - first round. There were some quick mental math questions, some questions about trading, and about my interest in market making. I didn't have many good answers for these questions and honestly wish I was more prepared. Also I'd recommend that you brush up on mental math before going into the interview. Review probability, expectations, multiplication, basic stuff that they test you on.

Received an assessment for 126 questions in 20 mins. Was not too bad all quick math and a lot of vocabulary. Not really a way to prepare for it other than brushing upon vocabulary.