This question is layered. The interviewers are looking for red flags. How you interpret this question will give your interviewer insight into your outlook on the world. Not only is your interviewer trying to get an idea of your personality and attitude, but also an idea of your communication skills and what you perceive as a problem. In the simplest terms, in this scenario, the last thing you want is to imply that the challenging person in this scenario was you, so avoid assigning blame. Objectify the situation, exhibiting an emotionally mature perspective, and explain how you navigated this terrain, ultimately leading to a successful resolution. In a healthcare setting, every member of the team has to communicate effectively and collaborate professionally, with as little emotion as possible. This is especially important when the health and safety of your patients depend on it.