Google Data Scientist interview questions

A Recruiter will call you through phone and schedule a phone interview with you about 30 mins. According to the team I applied, they asked you a lot of information related to their products.

Weird. First round phone interview is surprisingly easy. Then invited to on site interviews. But, three of the five scheduled interviewers decided not to show up in person, so the interviews were done via video conferencing. What's the point of having me on-site then? Four rounds of applied statistics, one round of behavioral.