"Business development managers work to expand their company's business, so employers are looking for go-getters who can identify promising opportunities, manage partner relations, and successfully implement partnerships into current business models. In an interview, expect to be quizzed on your analytical, interpersonal, and management skills. You may be asked to evaluate a prospective market or pitch an unorthodox business to the executives of a company."
I didn't realize that when I went through my top grading interview, they would go back as far as highschool!
Luckily I was able to recall some good high school stories, like starting the school paper and being on the cheer leading squad, so I hope that they were impressed by my demonstration of leadership abilities and initiative.