The onsite interview took 5 rounds plus a math test, it was really a long interview, but not including very formal technical coding stuff. Mostly depends on your interviewers, I was asked about SQL questions, Python, R, as well as machine learning concepts.

The first round telephone interview is held by HR, and is based on your resume mainly about your modeling experience, communication. The second round telephone interview is with the Director, more about technology, just based on the resume.