<p>This is not a dumb question as this is often a young person's first encounter with an interview/meeting w/some social protocols in place. This is applicable to other business mtgs as well.</p>

<p>1) If you arrive early and want one, get yourself a drink. When the interviewer (clearly your senior) arrives, he/she may or may not get a drink. You do not offer to buy him/her one. If he/she wants one, he/she will purchase one.</p>

<p>2) If you both arrive simultaneously or the interviewer is there already, he/she may offer to buy you a drink. If so, accept if you wish to do so. If not, you can delince politely and have a seat. </p>

<p>If he/she does not offer you a drink and you want one, ask if you can excuse yourself to get one. Nothing wrong with this whatsoever. Again, you don't offer to buy them one.</p>

<p>This is the typical situation when a junior and a senior meet (interviewee & interviewer, student & professor, job applicant & hiring person, etc.) -- the senior knows to offer to buy a drink for the junior or at least allow junior to buy himself/herself a drink; the junior does not offer to buy a drink for senior. </p>

<p>If both parties are more equal (say classmates or student & grad assistant), then the mutual offering of drinks is more common.</p>

<p>In most circumstances, it's inadvisable to order food/snacks unless you know, in advance, that this is a business meal (i.e. both are having breakfast, lunch or dinner). You don't want to be chatting w/food in your mouth if at all possible.</p>

<p>Good luck, interviewees!</p>