The real important question is the subsequent one:

— What are your salary expectations?

— $X

— Ok! That means if we propose Y, would you envision it?

— Yeah, maybe, because I’m out of choice / No because I already have an offer at $X-1.

Source: I’m hiring (and yes, Y enters into consideration because most candidates overestimate their skills, but I always go for X if the candidate is as expected).