I applied online. The process took 5 weeks. I interviewed at Citi
Interview
After first round interview, I was asked back for a second and final round. I interviewed with 8 people and everyone was very friendly. The interview lasted about 2 hours and I talked with two people at a time and then rotated.
Reached up to Phone Interview because they told me the dates of the internship and I wasn't available. The caller was friendly over the phone and asked me questions like what were my organizations and what did I do in each one of them. They also asked basic profile questions. It is a good thing tho that they clarified the dates of the internship.
I applied through an employee referral. The process took 3 months. I interviewed at Citi in Dec 2012
Interview
First interview was a phone screening with a few qualitative questions (i.e. tell me about yourself, why do you want this job, why do you like Citi, etc.). Second interview was a full super day at headquarters, consisting of 5 back-to-back 30-minute interviews. Questions weren't too technical, but getting very similar qualitative questions over and over again was quite tiring. Overall, a good experience and not too stressful.
Interview questions [1]
Question 1
Which do you think you will prefer, debt or equity markets?