I applied online. The process took 1 day. I interviewed at ZettaLabs (Bengaluru) in Dec 2019
Interview
There was a call for F2F interview after I applied through one of the job-portals.
Round 1: The interview was very generic, limited to basic understanding of Statistics, ML and Python. It was taken by the probable team-lead of the data science team. No tough questions asked, and this round went very well.
Round 2: Taken by a senior manager. He was putting up questions only pertaining to whatever terms I was using in our conversation. Questions were not difficult, but I faced difficulty in some scenario-based questions, which only improves after giving a few interviews over time.
All in all the experience was good, the people were friendly and hospitable.