Recently I learned something new about how to answer the question, “If we offered you the job, when could you start?” And no, it’s not a matter of saying “Whenever you want me to.” You need to understand why they’re asking. It’s a test!

You may have a general understanding of how to ask questions in a job interview, but here are three facts that may surprise you—and help you land the offer.

“Be prepared to give a presentation on a topic of your choice,” says the recruiter. Excited? Nervous? Either way, this is your chance to shine. But what interview presentation topic should you choose? Some choices will resonate better with your audience than others.