We had three rounds 1.Quantitative Aptitude 2.Technical and Managerial Intrview 3.HR Interview 5 top students from each branch were exempted from Apti test. I was not from the exempted slot but passed through all three rounds..it took us the whole two days but it was a good experience..Most of the questions for both Apti and other two rounds are not of an unexpected kind but from thoseonly which u can easily google and find out from various sites and blogs related to TCS.