A few short years ago, you could say almost anything or ask nearly any question in a job interview. But no more. Equal employment legislation makes it impossible to be indifferent about what you ask or don't ask in a job interview; whether or not you intend to discriminate, you may be violating the law.
Perhaps it's time to evaluate your interviewing procedure. Are some of your usual questions pointless? If so, discard them. And here are some other tips: