I applied online. The process took 1 day. I interviewed at FTI Consulting (Berlin) in Jan 2016
Interview
Submitted CV and cover letter. Then was invited for an interview. Causal atmosphere. Staff seemed encouraging and wanted me to be able to show what I know. Overall very positive experience.
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