When you don’t know how to answer a question during an interview, the silence can seem excruciating. You might even wish the floor would open up and swallow you whole. Not to worry, though—keep these tips in mind the next time you’re strapped for an answer. 1. Calm down. First of all, the most important thing to do is stay calm. If you start freaking out, your body will begin reacting physiologically. For example, your blood pressure will start rising, and your heart may race. Read more.