Try to put the ball back in interviewer's court by asking him about the salary they offer for a position like this. Most of the big companies will have a fixed remuneration for each level.
However, if this is negotiable, you will have more negotiation power if you have some work experience. So, know your lower limit (amount below which you can't go) and also know the maximum salary in the industry for the position then put forward a figure which is not very exact. It is better to mention a range. For e.g. if you are expecting something around 55 K, say that you expect something in mid fifties. Don't keep the range to broad otherwise you will be offered something towards the lower end.
If you are a fresher, most of the times you will have to accept the company's offering for the position. However, if you find it too less, you can definitely discuss that during the interview.