I always ask the systemd question to programmers. It’s fun to see how much technical knowledge or opinions people have. If you don’t know what it is, I get to see how you react to not knowing something.

It’s probably a little hard on those that don’t know. I’m not sure if they believe me when I say they aren’t expected to know.

Unfortunately, the question is quickly becoming dated. If you’re young and started with macOS and docker containers, you may never encounter it in your career. :)