I was incredibly nervous but I think the interview went really well for me. The guy who was assigned to interview me was a recent graduate and this was his first interview ever haha so he was super nice and informal and had the "Official Columbia Interview Questions" sheet right next to him LOL. So basically he asked very broad questions just to get to know me as a person and he DID NOT see my application so he didn't grill me on specific books, cultural events, etc. I brought them up on my own, and we had some in common which was nice. Here are some common questions straight from the "Official Sheet" lol :P
1. What specifically attracted you to Columbia?
2. What attracted you to New York City in general?
3. What do you see yourself studying at Columbia and why?
4. Where do you see yourself in ten years?
5. Do you see yourself living in the city permanently or would you move away?
6. How do you find time to manage all of your extracurriculars, volunteering, etc?
7. How would Columbia benefit from having you as a student?
8. (After I brought up the publications/books I've read) What magazines do you read religiously, and what are some of your favorite articles from them?
9. What category of books/magazines/publications do you enjoy?
10. Would you be comfortable studying abroad an entire year/ are you independent/self-sufficient?
That's about all I remember specifically haha hope it helps! The rest of it was mainly just a conversation - I'd say I asked about him just as much as he asked about me, which I think reflected very well because I was interested in his time at Columbia and how it shaped his future, etc. Try to have some questions for your interviewer, it helps flesh out things he/she liked/didn't like and also shows interest
I was extremely happy with my interview and I wish you guys all the best!! Good luck!