1⟩ Which activities prevent you from working?
Employers want to know, especially with part time employees who have other commitments, whether you will be able to work your scheduled hours. The interview question "Do you have any activities that would prevent you from working your schedule?" a way to verify that you have the time to commit.
"I spend a week during the winter vacationing with my family in Florida every year, but I can schedule that based on the busy times at work."