Warn interviewers: Don't ask loaded questions.

Train hiring managers to avoid asking intrusive, irrelevant and potentially illegal questions during job interviews. Any tainted or loaded questions can spur a lawsuit if the candidate isn't hired--and jurors may conclude the questions are smoking-gun evidence that proves discrimination.

Recent case: Glenn, 64, applied for a job at a Wisconsin auto-parts dealer. He had years of experience and a degree in supply chain management. Soon after applying, Glenn got an email from the company asking when he got his degree, which could indicate his age. He received a rejection note the same day. He sued for...