I was recently invited for a campus interview, and on my schedule there is a meeting with the entire search committee as a whole. My sense is this is relatively unusual, so I'm not sure what to expect/how to prepare. Anyone had experience or have thoughts about this?
Many of the interviews I've been on have had these. I believe it's a way of making sure that everyone on the search committee sees all the candidates answer the same questions. They usually have a list of questions that they ask round-robin. They were all pretty generic, "how do you integrate undergraduates into your research?", "what is your most meaningful teaching moment?", "where do you see yourself in 5 years", "How do you deal with plagiarism", "what are your lab/research needs?", "do you have questions for us?". I think my biggest mistakes on these kind of interviews (looking back), was to not give everyone eye contact, to be visibly frazzled when they asked a question that I wasn't prepared for, and to frame answers too negatively.
I was on a search committee last year and we did this. Ours, at least, was very low-key: a last chance for the candidate and us to ask/answer any lingering questions. And, as suggested above, a great chance to have all candidates answer the same questions. I found it very useful as a search committee member, especially because it was one of the last things we had the candidates do. So, it allowed us to get answers that were for example fed by current faculty to us or that occurred after a job talk, or in relation to things discussed in some of the other meetings the candidates had.
I experienced this at an on-campus interview as well. They asked me a lot of the questions that @win_some_lose_some mentioned along with questions about diversity. Unlike, @anonbanon, I think this is not the best way to handle it and certainly is not "low key" in the eyes of the interviewee. To be bombarded with questions at the end of the day is mentally draining. I was totally out of it and know I stumbled over questions. I think this can be handled a lot differently.