"When hiring a managing director, a company will look for someone with the industry knowledge, leadership skills, worth ethic, and ambition to grow the business through implementing new company policies and working closely with its board of directors. In an interview for this position, you will likely be tested on your knowledge of the markets the company operates in, PR skills, and communication and leadership skills."
There were not any interview questions I would consider difficult. They will ask you how much business and clients you can bring in right away, so you need to be honest here. They will also ask you if you can bring any of your friends over.
Just tell them that you have contact in many companies, but you cannot guarantee and future business. When it comes to recruiting for them, I just told them that my close friends always watch how I do and how much I'm satisfied with the new position, before they consider jumping ship.