As for disabilities, according

As for disabilities, according to the Americans with Disabilities Act, the only way that it is legally feasible to ask a question about physical or mental disability is the following:
QUESTION: Do you have any physical condition that would prevent you from doing this job?

Your answer should be no, unless you really are aware of something that would prevent you from doing that particular job. You may have a bad back or a trick knee or suffer from depression or diabetes, but if it doesn’t affect your job duties as described, you need not mention it. The rest is between you and your doctor. You are not obligated to reveal any disability that doesn’t directly impair your job performance for a particular job you are seeking.

The question “Do you have a disability?” is illegal.
It may be answered by a simple no.

Questions to Ask the Employer
There comes a time, usually near the end of the interview, when the employer will ask you if you have any questions about the company or the position. However curious you feel, now is not the time to ask whether you get an assigned parking space or whether you get an office or a cubicle. Those are real concerns, but not at this point.

Taken from : Fearless Interviewing - How To Win The Job