Have you authored anything that has been published?
This question allows your interviewer to see how many publications you might have, and it also opens the door for them to look into your writing skills and styles. So, when answering this question be sure to provide examples of your best accomplishments. This particular question is broad, but you should expect some version of it during a Medical Writer position interview.
"I've authored several scientific manuscripts that have been published in peer review journals (you can be specific depending on time and what the specific role is related to). Additionally, a lot of my work has been published internally in newsletters, training manuals, and reports."