I applied through college or university. The process took 2 weeks. I interviewed at Citi (New York, NY) in Mar 2011
Interview
Overall, they process things very quickly. There were three back to back, 30 min interviews, passed very quickly. Interviewers are from different groups and levels, but all very nice people. Citi cares a lot about how you fit, so the final round is still largely behavioral questions, but it really depends on the interviewer's experience. Hiring decision were given on the same day.
Interview questions [1]
Question 1
You have distribution with mean zero and standard deviation 1. Among 1000 data points, there are 3 smaller than -5 and 3 greater than 5. What is the distribution?