It’s not only not a valid question, it might not even be a legal question.

I’m a hiring manager for a very large tech company in California. I cannot ask any questions about age, ethnicity, country of origin, citizenship status, veteran status, marital status, health, and so on.

HR can ask if they’re eligible to work in the US, and I can ask whether they have the skills and talents I need for the position, but it’s tightly limited.

It still crops up all the time. There are decades worth of studies showing how having a non-white looking name or having age indicators present in work history or graduation dates influence reviewers to reject applications they’d otherwise accept.