The hiring person joined super late for the interview. The audio on their side was terrible. Worst part is no data was given to work on the problem. "Many times based on client requirements a candidate may have to investigate an algorithm new to them. They need to understand the implications of various parameters on how the algorithm is trained. I will spend 10-15 min educating the candidate on the algorithm, answering questions with no penalty (not expecting they know these details). I can "role play" the client, documentation, the data (if you want to run any trials). I will then ask 2 questions about the material I just covered. Outside information is not needed." they say it just take 5 to 15 minutes to answer 2 questions.

I got in touch with a recruiting agency. they setup first Intro call then one technical interview on phone then went for on-site interview that last for 4-5 hours with 4-5 programming and technical rounds. The programming question were average.