I applied online. The process took 2 months. I interviewed at UBS (London, England) in Feb 2011
Interview
There was a first stage of the interview consisting of a numerical and technical programming aptitude tests. They were very easy.
After that, there was a half day assessment centre. It consisted of a presentation exercise, interview and a group exercise - very standard. The interview was only competencies and CV, not technical. Overall a very good experience.
Interview questions [1]
Question 1
Do you know what's the difference between front and back office?