I just finished. Same old three questions as last year. Apparently the interviewer is an Indian student.
A funny thing is: I tried 5 times before getting connected a non-busy line. Assuming a rate of line-occupation of 50%, each interview lasting 6 minutes, and given we have a 4-hour session and 6 lines in total, then Columbia is conducting 120 interviews today. Even this conservatively estimated number is problematic: it is hard to believe that all of them are almost guaranteed admission just by virtue of receiving interview request.
I would venture to say at most 60% of those interviewees (70+) in Round 2 will finally get admitted. Otherwise even a relatively low 60% yield rate will make the class crowded.
Those who would say "interview=admission" please enlighten me.