If you’re applying for a checkout position, you’re going to be part of a team. Although they may be interested in knowing about scenarios where you’ve led a team, they’re probably going to focus more on your team-working skills and how you can work well with other people.
Expect to be asked about when you successful worked in a team to achieve something in a previous job. If this will be your first job, think about something at school, college or in a club or other aspect of your life where you’ve been successful in a team.
Good luck!