After submitting my resume, I received an Online Assessment for SQL & Python. It was estimated 115 minutes. It's medium level on difficulty. After that I had a interview with a person in Nielsen, it was just some basic behavioral questions to get the interviewer know me more as well as knowing the company more. My last round interview was with 5 team lead, they started the conversation by letting me know which project they are currently working on to give me a better idea of what Nielsen is doing. Then I started the self-instruction and talked about my previous projects and answered some questions they have for me. The whole process was pretty smooth.