Are you serious with your ideas for an interview? You have:

1. Someone running linux? What about gamers who dual boot or VM into linux? What about people using the new windows+ubuntu thing? What about people who do windows/android/whatever dev that can be done completely fine in windows?

2. Fine, but extremely easy. Not much more than a small filter

3. You don't expect an answer? What are you getting out of this?

4. What?

5. What? Why?