Prepping for my oral exam

Not with a dentist, but with a panel of my professors. I need  to answer nine questions posed to me on topics from the courses I took. The exam is an hour so that averages about seven minutes per answer. I need to clarify whether it is a monologue of me blathering for the entire time or a dialogue where they will ask me more questions or challenge some of my statements. Previous classmates have assured me that i will do fine but still I have been doing lots of reading. I know that I can be very inarticulate and inexpressive so I will need to be well-prepared. Presuming I pass, I will get my degree in January. Maybe I will have the grduation party I never had when I finall finished my bachelors at 29 years old.