The entire interview process for graduate training program at Sotheby's is very unprofessional.
Firstly, it was unclear from the beginning how many rounds of interviews there are, whether it is in-person or phone interview, and what to expect from the whole process. Everyone gets invited to the interview through a group email that asks you to schedule an interview within a week. Even though their website says that the first round is done over the phone, it is actually done in person in New York.
Secondly, the whole interview is a joke. The first (and only) round of interviews goes for less than 15 minutes with someone (very junior) from HR. Only a cheap and unprofessional company like Sotheby's would make you come in person at your own expense and do a pathetic 10-minute generic interview asking you about your background. At the end of the interview, the HR woman said that this was the only round of interviews and that she will contact everyone in 2 weeks (after she makes all decisions) to let them know whether they got a job. It took her 5 weeks to contact us (right before Christmas so that no one bothers them with follow ups).
Thirdly, they really go out of their way to make you dislike their whole company. The HR woman was incredibly arrogant and aloof. Although Sotheby's glass building looks nice from the outside, the interview was done in a basement-like windowless room where HR desks are. I guess this gave me a hint of what my time there would be like.
Finally, it is impossible to find out anything concrete regarding responsibilities and career path in this position. The HR woman gave me some generic description making it all sound like you are expected to serve coffees and help them use a photocopier without ever knowing when you are going to be promoted and which department you would work in. Judging by other comments online, you would be paid close to nothing during the entire time there.