Depending on what country and sometimes State/Province you're in there are questions that are legal, or illegal and they can differ. So its important to know what you're rights are depending on where you're applying a job.
some answers could be:
I've not been asked that question before, can you tell me how that relates to the position/job?
I'm not sure what you're concerns are related to this question, could you give me more information
or you could just say you're uncomfortable with this question.
See some ideas on a site called Careego - innapropriate questions to get some more ideas
If you are asked an illegal interview question, the best response it to politely not answer the question and to ask the interviewer the intent behind the question. You can also go ahead and answer the question, or you can flat out refuse to provide an answer.
Cuz
religion?
Questions about your plans to have children, race, sexual orientation etc would all be illegal - basically anything that it is not a relevant question to figure out if someone would be good at doing the job or not.
Does the illegal alien have to interview in her country for her F-1 visa
yes
The applicants technically are not ignoring illegal questions, They are oblivious that the questions may be illegal.
Interview for a job? The same way you interview anyone else. As of recently, it is illegal to discriminate if you are gay.
No, and it's illegal for them to ask.
just say no...
Do you mean what kind of question you might be asked, or what kind are legal/illegal for the interviewer to ask? Requirements can vary by state, though Federal law supercedes.
It depends on the laws of the state.