The Interview process was long(had 6 rounds) but the company does a great job in extracting your skills and potential. I was tested in SQL, Python(Automating), PowerBI(gave a presentation), Time Series Analysis and Forecasting(Gave a presentation). The Interviewers were very experienced and they make you very comfortable. The HR was very responsive and she helped me by answering all the questions I had about the process from the start to finish. They also tested me with some probability concepts. I did not answer some of the questions at that time but the VP(my current head) asked me to find the answers in 2 days.
Overall though it was a long process, it is good that I learned a lot. If you have the stuff and if you are willing to work hard, then its not a big deal!
The Interviewers also see if you are willing to learn!
As an employee, I feel good the company is doing a great job and I personally see a lot of opportunities for my personal development.