Open-ended and Close-ended questions

Hello, the open-ended questions are those that cannot be simply answered with a yes or no. Right? And the close-ended ones are those that can be answered with yes or no.

I'm curious this question where does it belong:
Do you prefer printed or digital books?

The question above is not answered with simply yes or no, but the answer can be "printed" or "digital" so I think it would be a better candidate for a closed-ended question. I'm curios about your opinion on it.

Thank you!