This is one of those hypothetical questions which many companies ask. It is very important for your answer to be both accurate and realistic. For example, if the company has a structured training scheme you could suggest that your first action would be to familiarise yourself with it and see if there was anything to do, before you start work, to prepare yourself for the training.

You might also consider meeting with all the key staff concerned with the product or service you will be marketing. The products /services themselves may also be new to you, so you may need to familiarize yourself with them when you first take up your position.

On the other hand you could want to discuss your first actions with your boss. A wise precaution for a new recruit. Your first action could therefore be to arrange to meet at his/her earliest convenience to discuss your first activities within the firm.