How to answer: An impressive answer would mention that there are laws in place to protect whistle-blowers from disciplinary action for sharing such information. You might also emphasise that you value confidentiality. For example, you could mention that you would keep the employee's identity private unless it was absolutely necessary to disclose it. With this answer, you can assure interviewers that, although you strictly enforce rules and laws, you also possess the interpersonal skills to build trust with employees.