being able to answer it indicates not that you are smart, but that you have a certain kind of background that leads you to have been exposed to such things.
This is exactly what is wrong with software hiring, popularized in recent years by Google and thus spread throughout tech startups everywhere. You are applying inherent bias to your candidate list and self-limiting the kinds of people that could add value to the company. In other words, your hiring process will collect many people who think inside the box you want them to think in, and reject every person who thinks outside of that box. That is dangerous for both a company's intellectual and cultural health.