I have never heard of anything like that. I am guessing that you are wondering because you are in a situation where you are interviewing at jobs at the same time you are applying for med school, with the idea that you might need to get a job if you do not get into school, or you need a job until school starts, at which point you will semi-guiltily quit the job, leaving the company twisting in the wind, and you want to know if they know that you are going to do this without you telling them that you are going to do it.