I contacted through career site. 1st round was an aptitude test( quantative, DI and logical n verbal reasoning) 50 questions in total. 2nd was technical questions related to skillset. 3rd round was managerial round with solving a case study. Feedback and result was shared by HR on the same day of the interview

Invited me to the office one day where there were three rounds of interviews 1) Mostly about my profile 2) Puzzles and Case Study 3) Technical round about SAS, Python and Hadoop 4) HR Round The offer was communicated to me in the next 2-3 days.