Are You Married?
Anything that fishes for information about a candidate's family plans (marriage, engagement, and child planning) is technically illegal because it falls under pregnancy discrimination. It can often seem like a hiring manager is just making pleasant conversation and trying to get to know you better, but job applicants are not obligated to disclose any personal information. This could also be a subtle way to question someone about their sexual orientation—another protected class.
How Old Are You?
Lots of applications will stipulate that employees have to be over 18, and that's fine—ensuring their workers are not minors is within a company's rights. But this question becomes problematic when interviewers ask more mature candidates that question, because it's illegal to discriminate against anyone over 40 on the basis of age. If anyone asks, don't feel bad about declining to respond. Recognize that whoever is interviewing you probably already has some sense of your age just from looking at your resume.
When Did You Graduate?
We all know how math works—this is just a not-so-sly way to calculate someone's age. (Feel free to nix the graduation year from your resume, too.) "If the interviewer presses for a reply, you might give him the date and then ask how that applies to your candidacy," Studner says. "And in the final analysis, would you really want to work for a company where the management discriminates against age? It might be better to move on."
How's Your Health?
If it's a physically demanding job, employers have a right to ask about specific physical abilities. For example: "This job requires lifting packages up to 30 pounds, or standing on your feet for six hours a day, or talking on the phone at least 80 percent of the time. Is this something you can do on a continuous basis?" But anything that isn't directly related to tasks you'll be performing on the job is personal information that you don't have to—and shouldn't—reveal.
What Religion Are You? Do You Observe Any Religious Holidays?
It's illegal to discuss your religion in an interview, even if it will affect your need to take time off. It can be awkward to back out of this question if an employer presses the issue, so Studner suggests a polite but firm, "I prefer not to discuss my religion, but I can assure you that it will not interfere with my doing this job."