No-No Interview Questions

"When conducting job interviews, it's important to ask the right questions to get the information you need to see if the person you're interviewing is a good fit for the job. But it's also important to know what not to ask - in other words, what the various employment laws say you can't ask or what might suggest to an outsider that you're considering an impermissible trait in evaluating candidates.

As a general rule of thumb, all of your questions should be directly related to the job in question and the job duties the applicant would be required to perform if hired. Of course, you need to steer clear of asking applicants about their age, race, color, sex, disability, religion, national origin, pregnancy, and other protected classifications.
While it would be impossible to create an exhaustive list of 'no-no' questions.."this list from HR Hero Line provides a good place to start.

Via this George's Employment Blawg post.