Questions about your family status, gender (“How would you handle managing a team of all men?”), nationality (“Where were you born?”), religion, or age, are illegal—but they still get asked (and frequently). Of course, not always with ill intent—the interviewer might just be trying to make conversation—but you should definitely tie any questions about your personal life (or anything else you think might be inappropriate) back to the job at hand. For this question, think: “You know, I’m not quite there yet. But I am very interested in the career paths at your company. Can you tell me more about that?”
What your interviewer is really trying to do with this question—beyond identifying any major red flags—is to gauge your self-awareness and honesty. So, “I can't meet a deadline to save my life” is not an option—but neither is “Nothing! I'm perfect!” Strike a balance by thinking of something that you struggle with but that you’re working to improve. For example, maybe you’ve never been strong at public speaking, but you've recently volunteered to run meetings to help you be more comfortable when addressing a crowd.
Whenever possible, you should speak about your achievements from the perspective of an employer (helping them to find new customers, helping them to improve their reputation, building good atmosphere on the workplace, earning more money, etc), rather than achievements from your own perspective (getting promoted, earning a degree or certification, etc).
Remember that employers hire workers to solve a problem, whether it’s boosting sales or streamlining processes or building a brand. Your goal when making your pitch is to show that you’re the best person to solve that problem. Interviewers ask questions about why you should be hired to measure how you qualify for the job and fit in with the company.
Everyone disagrees with the boss from time to time, but in asking this interview question, hiring managers want to know that you can do so in a productive, professional way. “You don’t want to tell the story about the time when you disagreed but your boss was being a jerk and you just gave in to keep the peace. And you don’t want to tell the one where you realized you were wrong,” says Peggy McKee of Career Confidential. “Tell the one where your actions made a positive difference on the outcome of the situation, whether it was a work-related outcome or a more effective and productive working relationship.”