one phone interview and then super day. there is one math exam and and one programming exam, four back to back interviews with lots of math and brain teasers. one of the interview has many math questions. they require highly technical skills. question uses taylor expansion; basic knowledge about derivatives;

First Round via phone interview, three math problems without any behavioral questions. The questions were not hard but could demonstrate your logic when thinking. Then got invitation to Superday. Met four people at trading and also quant development desk. The interviewers were really nice in general. Didn't do well in the technical interview.