Columbia University interview questions

one interview with a professor and she asked questions if I'm willing to continue in the next semester and asked "Do you know how to use R, Bayesian Models, Time Series Modesl?"

There was a 3-hour interview with 9 people - partially over zoom in an office alone and partially in person. It was very intense. I had to keep taking my mask on and off for the different interviews. Zoom made things difficult because there were slight delays that led to people speaking over each other. I had never heard of an interview like this