There were two rounds. The first round was relatively easy, just going over your resume and various behavioral questions for half an hour. The final round consisted of 3 1:1 interviews, each questioning you on various skills and thinking methodologies, etc. as well as a presentation, which was probably also a test. The final round was a long day for sure. FTI was also stupidly slow with the time it took them to notify you of admittance to the next round and then of the offer.