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Replying with snark is unlikely to land you a job. With the exception of specific legal prohibitions (eg What is your religion?), they can do what they want. And the competition for employment is so tough that they are able to. It's an employer's paradise.
I always thought they asked that question to see if people put themselves through college. If you had a job in college, put it down. I was a tutor in college; part-time mind you but I put that down.