After HR's initial discussion I asked to take the initial technical round she asked about my project and after that, it's all about the fundamentals of Statistics and Data Analysis. I successfully cleared that first round and asked to do some EDA work on the data they provided. They gave me enough time to do it and I did it successfully and informed that the next round will be with C.O.O. Unfortunately I didn't get that call at the scheduled time. I tried to contact HR and no response from their side.. So I was rushed to my office stuff after a while I got call from the COO. He almost touched all the areas of our work cycle like databases(SQL), visualization tools, model building, and other personal questions like family details, interests why I choose this role, and Statistics, etc. I gave my best and felt like I am done with this discussion/process and waited for a week to hear the good news but unfortunately I didn't.. when I called HR I got to know that some other thing about the opening..