If I were to call your previous employer, how do you think they’d describe your attitude?

This question tests your stress responses in real-time by hinting that they may have talked to your previous employer. They may have, but in all likelihood, they haven't, and most states have laws limiting what can be disclosed or shared. Maintain your confidence and enthusiasm throughout your interview, and do not allow such questions to trip you up. Put some self-evaluative thought into your answer. Identify your growth opportunities and talk up your merits.