ANSWER A: I would tell my coworker

ANSWER A: I would tell my coworker that it’s illegal to steal from the company.
ANSWER B: I would immediately tell my supervisor.
ANSWER C: I would probably tell my coworker that I had suspicions about his or her stealing and that I hoped he or she would return what was stolen. If I noticed that the stealing continued, I would have to bring it up with my supervisor.

Answers A and B both make sense. They are not necessarily the “wrong” answers. Answer C, however, is the most appropriate one because it shows that the interviewee would first attempt to solve the problem with the other employee on his or her own and then get management involved only if those strategies didn’t work.

Companies generally prefer that employees try to work out their problems themselves. It shows good interpersonal skills to be able to bring up something negative with a coworker. Of course, if the problem can’t be solved, it shows good judgment and loyalty to the company to broach the subject with a manager or supervisor.

Taken from : Fearless Interviewing - How To Win The Job