My reply is pretty much always "What's your budget?". If they tell me the budget, I say the top of what they said or sometimes a bit above it (because it's pretty much a guarantee that they're lying about the real budget), if they don't or try weasel out of it, I tell them I'm not comfortable answering without knowing what I should realistically be looking at (and they get negative points from my POV, because why be sneaky with this kind of info?)
It's a shitty question born out of the company trying to screw candidates if they say the wrong number unknowingly. Too high of an expectation? That's a negative mark. Too low? Great, we can fuck them over by underpaying them 20% below what we would've if we'd just posted the salary.
Same with all the other similar ones. Where am I in the process with others? None of your business, I just say I'm not interviewing with anyone else.