Honest answers? OP, why presume one has to give honest answers?
Other than
specific questions about skill and experience.....you could likely tell tall tales all you want and they'd never know.
The last three interviews I had, almost all questions were:
-- Tell me about a time when....? (you could make up an example, and they'd never know)
-- What would you do if.....? (you could tell them what they want to hear, even if it's not really what you'd do.)
-- What's your proudest business and personal accomplishment..." (just pick something impressive)
-- How did you handle it when...?
-- What's your biggest business and personal disappointment...? (pick something innocuous, but not too innocuous
)
-- Do you like work alone or in a team....?
You get the idea.
Nothing specifically related to can you actually DO -- or have you actually done -- this or that.
I know engineers and IT folks have said they don't get those kinds of interviews. But I think that
most interviews today are the personality type. Which may be fine with most folks, because they can just make stuff up to get the job. (which is the goal, after all
)
As for what to look for on interview day, I'd say sure cleanliness, but also try to pick up a "vibe/atmosphere/intangible energy" from the place. Is someone who works there, when you're introduced and the boss or HR person is standing there, really going to say, "this place is hell and sucking our souls dry, run like the wind?" Of course not.
If you're desperate for the job, you may end up having to accept an offer you don't even want anyway.
If you HAVE a job, and don't need this one, then you can afford to be more pointed in what you
really want to know. Even then -- depending on whether you mind if more of your time is wasted -- I might hold off on what I call "nitty-gritty" rubber-meets-the-road-questions until you have an offer and are negotiating -- when you know they want YOU.
As for questions about expansion and management style....sure you gotta ask. But just remember interviewers lie. So sometimes in the end you're weighing what you think is true vs. what you don't believe.