"Tell me about a time" or "Explain how you would deal with" type questions are very popular interview questions tbh. You don't need a reference for them, so if you don't have one make a realistic one up. School project, sports teams, stuff like that. Topics like dealing with workplace conflict or customer/client dissatisfaction are obvious ones.
Most entry level jobs are looking for attitude rather than skill set. If you can convince them you are capable, reliable and have whatever attitude/mindset the area you applying for values, you've got a good chance. I think you 100% need to give the interviewer the impression you have prepped for the interview but also not give the impression that prepped means scripted. If you can throw out something insightful when asked what you know about the company/job role or a thoughtful question when the inevitable wrap up occurs, you can set yourself apart from the crowd, who 9/10 will paraphrase each others answers to questions. You do need to convince them you are genuine, everyone is a hardworking dedicated team player in an interview.