I applied through university. The process took 3 months. I interviewed at Deloitte (Barcelona) in Nov 2013
Interview
4 interviews:
1) Group interview (10 people in total), including 4 "quick" tests (reading, logic, maths, english skills) and a group assignment to discuss and reach a joint conclussion
2) HR interview, with a background check
3) Technical interview with your (hopefully) future direct boss
4) Last interview with a Partner (high-rank boss in the internal hierarchy)
Interview questions [1]
Question 1
Nothing remarkably difficult. The most critical question was in the 3rd interview: "What can Deloitte offer to you and what will you offer to Deloitte?".
I applied through university. The process took 2 days. I interviewed at Deloitte in Nov 2010
Interview
I applied through a school website and had an hour long campus interview, two 30-minute interviews with local managers. It was a standard fit-interview. Final rounds were at the office, totaling about 4-5 hours, including lunch and other activities that HR puts on. Two senior employees, including one partner, interview you for 30 minutes each. Another standard fit-interview. Candidates were extended an offer a couple hours after the final rounds on the same day.