No, you're responding to what I said. There are multiple people calling you out here: please try to keep the usernames straight when responding.
The point of an interview is to ask questions, and particularly in the more freewheeling environment of a startup, "what sort of stuff do you like working on?" is very much relevant to whether they'd be a fit. Sergey Brin would famously ask early applicants to Google "Teach me something that I don't know already, about any topic." YCombinator's application form, for a long time, had the question "Tell us about a time you successfully hacked some (non-computer) system to your advantage", and the answers were explicitly supposed to be naughty if not illegal.
Not everybody works for a big company with a big HR department. The tech industry is a broad place.
Author was irrelevant in my reply. I was responding to the context. And come on now, consensus doesn't define correctness.
"Teach me something that I don't know already, about any topic."
"Tell us about a time you successfully hacked some (non-computer) system to your advantage"
This should not surprise you, but those are perfectly fine. These are very similar to the examples given to us for the appropriate/professional way to ask.
That's a good recommendation for the original commenter, on how to reword their question. They're not direct probes into personal time. I should have included something like that in my original reply.
The point of an interview is to ask questions, and particularly in the more freewheeling environment of a startup, "what sort of stuff do you like working on?" is very much relevant to whether they'd be a fit. Sergey Brin would famously ask early applicants to Google "Teach me something that I don't know already, about any topic." YCombinator's application form, for a long time, had the question "Tell us about a time you successfully hacked some (non-computer) system to your advantage", and the answers were explicitly supposed to be naughty if not illegal.
Not everybody works for a big company with a big HR department. The tech industry is a broad place.