Very important question, why do you want to leave your current situation for this role, be prepared for this answer and put a lot of thought into this. e.g. the company profile has always interested you, your interest in some of their key services they provide, for example if you are a Fund Accountant and have only worked on mutual funds to date and this organisation specialise in Hedge Funds and this is the area you want to get into, Your understanding in how they are rated in the market, how you feel your skills will benefit the company and how this position will benefit you for the next stage of your career and that you are thinking long term.