The interviewer wants to know that you are a very ethical person and that if you make a mistake or witness an ethical concern, you will do the right thing and report it to upper management. Ethical issues can be things like time falsification, reporting or recording false data, intentional actions that pose as a safety hazard, or any intentional misrepresentation of data. The interviewer wants to hear that you are willing to do the right thing even when no one is around. Provide an example of a time that you had to make a decision when it came to ethical concern and talk about the details of the outcome.