How do you handle your mistakes? The interviewer knows you're not perfect, as you are human. Show your self-awareness and how you have learned from your mistakes. Certain topics will help you answer this question more concisely than others. Using a personal conflict, like a disagreement or miscommunication may take longer to explain without going in depth. Consider sharing about a scheduling issue or arriving late to work. Keep it light and show that you are proactive in clearing up issues that could arise.
"In a previous role, I was involved in decisions with where to do our community-service projects at times. There was a disagreement over where our efforts should be. I suggested a more difficult undertaking that did not go over well with the team because they did not want to allocate as much time. I took responsibility for the choice and spoke to the individuals about my reasoning. I told them that I felt the event would make more of a difference in the community than cleaning up a road as we usually do since it would allow us to be mentors to troubled youth as well as provide them with a cleaner building to use. It was better than simply doing manual labor and ended up being a successful event that everyone plans on doing again in the future."