This can be a tricky question to answer, especially if you have never held a supervisory / managerial position or had any form of responsibility. In your replies you need to display resourcefulness, an ability to solve problems, your decision making skills and be able to clearly explain the approach you used. No matter how little work experience you have you should always be able to lead and come up with creative solutions. Describe situations where you came up with an idea that increased efficiency in your office or cut costs after you discovered a cheaper supplier etc.