Many rounds of brainteasers, some of which are more rapid fire in nature and others which require you to flesh out a detailed answer to a complex problem. Be well rested and well prepared!
I applied online. The process took 1 week. I interviewed at Jane Street in Apr 2014
Interview
6 questions in total,
4 mental math:
12% of 37,
2 million minus 222,
46 square
probability that when 2 cards is drawn from a poker without joker, the number is both 10
1 brain teaser ( as listed below)
1 clock question( angle between minute hand and clock hand at 9:30)
Interview questions [1]
Question 1
One man is standing at 1/4 of the bridge, he hears a train coming( but he doesn't know the direction and the distance), and he starts running, and the train doesn't hit him. What is the relative speed of the man and the train?
mostly maths probability questions - a lot of conditional probability, relatively easy in the first round, but you need to think out loud - you need to be really fast
4 rounds in final. The first one is market making of cards. The rest are especially designed games. The interviewer may ask added question along the playing of the game