CPR certifications typically last for two years, depending on what agency certified you. It is easy to overlook when certifications expire, even though that is your responsibility to stay current. The interviewer wants to see that you are honest and own up to your mistakes or oversight. Since having a current CPR card is part of the job requirement, the interviewer wants to hear that you would be concerned with the card's expiration and that you would contact your supervisor immediately and ask for guidance. Then, they want to hear that you would take the steps needed to renew your certification promptly.