First interview was done through the phone, was told there would be 3 more rounds of interview where the second interview would be to find out my interest and motivations, and the 3rd would be a case study. However, one night before the interview I received an email stating that the case study would be tomorrow morning (in a few hours). It was stated that I would have to submit the case study. However on the day of the interview, they said I Do not have to submit the case. Was a confusing process