There were two rounds of phone interview. The first round interviewer was quite professional. Asked detailed research questions and machine learning methodologies. Questions are quite basic and touch base. He then went through two spam related questions regarding model building. Both are interesting and problem driven. The experience was quite positive and informative. The second round interviewer was a Chinese. He didn't seem to be able to communicate well in English. I asked what would be covered before interview. He didn't specify computer would be needed. As the interview started, he said "I'm sending you a question through email." and asked me to load the question. Luckily I was next to a computer. He failed to describe his question properly and kept interrupt my thinking process. When I coded wrongly, he started laughing. I actually wanted to stop this conversation because his lack of respect. He then started questions related to my research and projects. He failed to ask question to the point. It always took me at least more than two try to understand what he wants to know. The interview was exhausting and not constructive in any way. I only wish to end the conversation sooner.

one round screening machine learning plus coding (medium) Then give a 45 min job talk plus 10min QA Three rounds of follow-up machine learning and research interviews, one round manager interview.