I had 2 phone interviews to start matters off. These were relatively simple. However, my third interview lasted 5 hours. Scheduled during finals week (I was an MBA student), I was required to do an hour-long presentation consulting an unknown company. This required several hundreds of pages of reading to prepare for this case study. Several of my classmates and I presented, but alone. About 5 people were watching, and they absolutely grill you. Actually, about half of the hour was probably me giving my planned presentation, and the other half was be them asking very specific/critical questions about my work. They were trying to imitate a difficult client. I also interviewed with 4 other people, each for an hour. After that 5 hour interview, I had another "surprise" phone interview on very short notice. There were only 4 final candidates vying for 2 positions, yet they made their decision almost two months before notifying me that I didn't get the job. I knew I didn't get the job long before, since I knew the people who DID get the job. Overall, the company left a poor taste in my mouth. I got the feeling that they do not treat their people very well, but the people there are very bright.

The process involved 4 rounds: 1. HR basic detail clarification round, 2. Technical round if interview with hiring manager, 3. Case study, 4. Interview with a panel of 2-3 Senior Directors to check your fit with the firm.