Please see below a non-exhaustive, but already quite comprehensive, list of potential questions
What was a situation where you set a major goal and been able to achieve it?
Tell me about a time when you achieved a difficult goal
What has been your major accomplishment so far?
Tell me about a time that you did something innovative
Give me three examples of a time that you lead a group.
What are some key lessons you have learned about motivating people?
Tell me about a time you lead a team through a conflict
Tell me about a time you lead a team to achieve a difficult goal
Tell me about a time where you were leading a team and you needed to force someone to work when they didn't want to do it
Tell me about a time that you persuaded your boss to go along with an idea you had
Tell me about a time that you managed upwards
Tell me about a time that you changed someone's mind
Tell me about a difficult situation where you had to rely on your communication skills
Tell me about a time where you dealt with a conflict/crisis/difficult member in your team