Campus interviews at Big 4 Accounting firms are typically held on college campuses or 3rd party sites. They are not often conducted at the office of the Big 4. For the campus interview, you may be dealing with a recruiter who does this everyday. He has seen the best candidates, but he certainly has seen some that are worse than you. The point is, he knows how important this interview is to you and will want to see how you handle yourself under pressure.
Unless your GPA is extremely low you probably won’t be asked too many questions about it. However, if your GPA is very high (i.e. 3.7 or greater), make sure you touch on that at some point. Recruiters often pride themselves on the “stats” of the class they bring into the firm. If GPA is your strong point, you have already won half the battle of impressing the recruiter.
If not, don’t worry. Your GPA is at least high enough to get you into the interview chair. At this point you need to focus 100% on the real secret to what the recruiter is looking for: personality.
The tone of your interview is likely to be more conversational than fact based. Don’t expect to get any technical accounting questions unless it pertains to something on your resume. Like the meet and greet, the recruiter will be attempting to judge how you handle yourself in a social setting.
If hired, you will spend a great deal of your life interviewing clients and conducting meetings. Because of this, it is in the firm’s best interest to gauge whether you have the social skills required to pull this off. While they are not necessarily looking for the best talker, they will want to see you demonstrate that you can have an intelligent and informed conversation.
Often times right before the interview, you end up waiting in the lobby. Get up and remember to shake hands with everyone in the room. If they start to talk with you, chances are they work for the company you are interviewing with. Exchange pleasantries (i.e., how it’s 2:30, you must be exhausted, or how 'bout that weather, gorgeous huh?)
The questions for the campus interview and the office visit may overlap and you can’t be sure which will occur at both events. See my book for “Questions the recruiters WILL ask you during the interview”.