If you have not already learned the term, research the concept of "therapeutic privilege" before your interview. In a nutshell, therapeutic privilege refers to "the act of withholding information by a clinician, with the underlying notion that the disclosure of this information would inflict harm or suffering upon the patient." While Indiana University School of Medicine promotes an environment that is honest and ethical, there will be times in your career when you may need to utilize therapeutic privilege to protect your patient.
When asking this question, the interviewer is questioning your knowledge, character, and ethics at the same time. Prepare a well-versed answer, as this question often occurs during medical school and into your career. Your answer should be brief, clear, and straightforward.