A Q-clearance is required and somethings simply can not be disclosed. Here is what I can say... have you had budget experience? Do you know the different types of burden rates & how they affect the bottom line. Have you been in a leader/Supervisor role before and what successes and failures have you had. How did you learn from mistakes and do you have an example. What type of manager are you and have examples of why you feel its the best. Have a water and take plenty of sips and really pause and review in your mind before answering. Good luck, always tell the truth.