The most scientifically valid questions are ones like "what would you do if a customer rang up and abused you?", or "how have you acted in a stressful situation in the past?" -- ones which ask how you
think you would respond, or giving examples of how you
have acted in the past. They're 'valid', meaning the're pretty good at predicting how you'd actually fare. They're hard, too, because it's difficult to think on the spot of a socially desirable answer that isn't what you'd naturally do...
However, I doubt that a telemarketer is aware or will use that too much, and so the interview will probably be unstructured and more a test to make sure you can turn up on time and string together a coherent sentence. As with any from of negotiation (which is what a job interview is in a way), as soon as you feel you can't walk away from it, you're screwed -- so go in there with an attitude that if you don't get it, there are a hundred other jobs you'll be able to take up, which'll be advertised in the next week or two. Confidence is key. Good firm handshake, look them in the eye, introduce yourself, have a few questions ready for the end
-- DO NOT ASK ABOUT THE PAY, unless they bring it up.. not at this level of interview, anyway. In the end you'll be getting award wages: if you're really curious, just look up the award rate on the Industrial Relations' website. (OR click
here)