How do you think previous employees would rate you as a manager?
A large part of a bank manager's job is to oversee others. The interviewer wants to know whether people who have worked below you in the past would say you're a good manager or not. Be honest but definitely emphasize your strengths and experience in this area.
"I've been managing others for many years now and am a strong leader who inspires and motivates others. I believe that employees who have worked under me would say that I'm empathetic and fair. I also think they would say that I have high standards. I expect employees to work hard and to deliver an exceptional customer experience; however, I am quick to praise and reward them for doing so. In addition, they would likely say that I strive to ensure that employees receive access to lots of growth and development opportunities. This is because I believe that if employees are growing and learning, their satisfaction will spill over into how they are performing their job. In addition, I am an inclusive leader who values diverse perspectives."