First interview was a phone screen about what technical experience I had with datasets. Second interview was onsite; interviewed by a member of the team and asked to run through a data processing exercise. Before both interviews I had ample opportunities to ask questions about the company before they started on the personality and technical questions about myself.

Round 1: Brief HR interview - Asked about reason for leaving previous job, current CTC, etc. Round 2: Interview with another senior developer - Asked about job experience, technologies/projects that I have worked on etc. Round 3: Interview with Product Manager - Again some question regarding reason for leaving job, some questions on Algorithm, puzzles. Round 4: Task - I told them that I was getting late and they mailed me the task and asked me to revert back with project files.