I had a behavioral with a current analyst, then a Superday with 3 members of the division. During the Superday, I was also assigned a case study to be conducted and presented live to the Superday interviewers.
I applied online. The process took 3+ months. I interviewed at Citi (London, England) in Dec 2012
Interview
No preliminary round. Only one final AC comprehending 4 interviews, one case study with individual presentation, one group case study and two tests (one verbal, one quantitative)
Interview with HR and a current analyst (behavioral + CV). Another round where there was 2 interviews from people from the department and then a prresentation based on a document they present
I had 2 interviews. First one was general interview with 2 company employees, they asked about my experiences. Second one was interview with case study. with more specific technical questions.