The process took 4 days. I interviewed at Susquehanna International Group in Mar 2009
Interview
Started with a phone screen followed by a group panel interview and a one on one interview. Mixed bunch of questions ranging from general brain teasers to writing code on a white board. There were definitely stress tests with one of the interviewers behaving extremely rude and arrogant.
Interview questions [1]
Question 1
Assembly level explanation of virtual functions in C++