Interviews not super difficult but can get tripped up at times. Be careful about taking your time and talking through your answer. I had trouble with the games they played.
Interview questions [1]
Question 1
You have 25 swimmers and 5 lanes and no stopwatch. How many races do you need to determine the 3 fastest swimmers in order?
I interviewed at Susquehanna International Group (Bala Cynwyd, PA)
Interview
The process started with a timed online assessment that tested probability, mental math, logic, and some calculus. The questions got harder as the test went on, so time management was important. After that, there was an interview focused on problem solving and explaining my reasoning out loud. They cared less about just getting the answer and more about how I broke down the problem, handled uncertainty, and adjusted when I realized something was wrong.
Interview questions [1]
Question 1
you flip a fair coin until you get HTH. What is the expected number of flips needed?
I interviewed at Susquehanna International Group (Bala Cynwyd, PA)
Interview
The interview process was first a 60 min test and then a 30 min phone interview. I was asked basic behavioral questions for 2 minutes and then 3 problem solving questions.