I applied through other source. The process took 1 day. I interviewed at FTI Consulting in June 2012
Interview
Found an employee's contact information online and asked if they had internship opportunities. Very welcoming and kind during interview. Asked about previous experience in Marketing and other job experiences in general. Wanted to get an idea of my skill set to see what I could contribute to the company. Asked about my long-term career goals.
For the AC
1) group round - did a case study and each of us were asked questions based on our group answer after
2) math and verbal reasoning test, written essay test
3) individual interviews - one with current analysts about cv, one with a partner (casing)
Pretty basic behavioral questions - no technicals. I'd recommend knowing your "why" and being able to clearly explain your interest in the specific practice. Also, prepare to ask the interviewer more in-depth questions, too.
Online assessment including verbal and numerical parts for the financial and economic consulting intern position. Given one minute for each question, I insist the time was quite tight for verbal part