Applied for the job via online job portal. I received an email thereafter for a face to face interview in Pune office. There were 3 rounds. 1st round - Case Study (40-45 mins) In this round, we were given a case to solve along with the datasets provided. Many questions were asked based on the dataset provided. It mainly tested the SQL writing skills, analytical thinking ability, data quality checking ability etc. The solutions to the questions needs to be written on a paper. 2nd round - Interview based on Case and Projects(1 hr +) In this round, questions were asked on the solutions provided in the case interview. Many concepts were tested by twisting and turning the methodology of solutions suggested. Questions on the projects worked was asked. This was the most challenging round. 3rd round - Behaviour + Personal Interview ( 30 mins) In this round, questions on the projects worked were asked. Post which they test whether you will be good fit for ZS by asking multiple behavioral questions.