There were 4-5 rounds. First round was a online knowledge test to assess your knowledge about data science and machine learning skills. 2nd is a phone screen, 3rd round is a video screen to ask you to describe your previous research and work experience, 4th round is a data science assignment. The final round is split into multiple sub-sessions to be interviewed technically and behaviourally by relevant data teams in their company. Once I cleared all the rounds, they sent a formatted rejection letter, not saying why I was rejected. I was graduated from one of the top 3 Canadian Universities, with a PhD degree, and my skill set is an overkill to what they do there. So the selection process is not very transparent and who knows what happens behind the curtains! I thought this was a big International corporation, but shame on you! Don't apply and don't waste your time and energy, otherwise, they will waste yours.