DON’T say a number. Why? you have the least amount of leverage possible at this point, assuming you’re early in the interview process. You haven’t finished interviewing with them, they don’t know if you’re any good or if they even want to hire you. So you can’t command a high salary right now. If you go too low with your price, they’ll hold you to it later. Go too high? You’ll scare them off before they even know what you’re worth!
Of course, if you have an issue that is very important to you that could be a deal-breaker (like company culture), you can mention it. Just be prepared for them to take one extreme or the other. For example, maybe you only want to work for companies that buy from vendors in your home country. The hiring manager will let you know if their company does this. And if they don’t, I guess the interview is over.
If you are currently employed, you should be honest about the start date and show professionalism. You should tell them you would have to discuss a transition with your current company to see if they require a two-week notice (or some other timing). If you currently have a critical role, your potential new employer would expect a transition period.
Questions about your family status, gender (“How would you handle managing a team of all men?”), nationality (“Where were you born?”), religion, or age, are illegal—but they still get asked (and frequently). Of course, not always with ill intent—the interviewer might just be trying to make conversation—but you should definitely tie any questions about your personal life (or anything else you think might be inappropriate) back to the job at hand. For this question, think: “You know, I’m not quite there yet. But I am very interested in the career paths at your company. Can you tell me more about that?”
"Choose an answer that shows that you can meet a stressful situation head-on in a productive, positive manner and let nothing stop you from accomplishing your goals," says McKee. A great approach is to talk through your go-to stress-reduction tactics (making the world's greatest to-do list, stopping to take 10 deep breaths), and then share an example of a stressful situation you navigated with ease.