Professional Portfolio

So I am about to graduate from Hawkeye Community College and I am required to prepare a Professional Portfolio to present to a panel of professionals in the field of photography. I have to admit I am a bit nervous because the portfolio has to be accepted and I don't know the exact format or the types of questions I will be asked. Will they ask me technical questions about how a photograph may have been executed? Will my dress and demeanor determine if my portfolio will be accepted? Will I be compared to the rest of my classmates or am I going to be judged just on my work alone.? Oh so many questions and not enough answers. Any ideas?