From a student who have a Jones Day interview a little under two weeks ago:
"My interview with Jones day was with two partners and lasted about 40 minutes. They were very friendly and really let you lead the conversation to where you wanted it to go. Nothing really came up that I wasn’t expecting, but they did grill me on what I said. I would suggest getting a friend to mock interview you and push everything you say so that you are prepared to defend yourself.
They really pushed me on my “Why Jones Day?” answer. I made sure that I could talk about a logical path that I took before I decided on Jones Day – began with international presence, high profile M&A work and then discussed their culture – each time discussing similar firms and why I preferred Jones Day.
They also really pushed me on why commercial law and they asked for a business news story that I found interesting. For this point I would say use something genuinely recent that you have genuinely found interesting – they might not believe you if it is too technical and it is unlikely to spur on an interesting conversation. You can link almost anything to a law firm – it doesn’t have to be too obvious.
They also asked me which departments would be involved in a typical transaction, why I choose to do much work experience that wasn't legal, what would be the negatives of working at the firm, where I saw myself in 10 years, what my working style was, an example of when I had gone beyond what was expected of me, and which kind of work appealed to me most. If you can, I would prep 2/3 commercial topics that you find interesting and try to bring them up. They were really keen to hear about what I found interesting and seemed impressed when I brought them into my answers for the more typical questions."
From personal experience, it's quite a nice interview. I had the impression they genuinely wanted to know more about me. Just be careful not to let your guard down too much during the trainee chat.