Look at your portfolio. In there should be example questions that you may get, or at least the topics that you will be required to know about. On top of that you are then looking at what I consider experience/knowledge on the deer that you are going out for. But the AW should also be looking at things like safety, when you have a bullet in the chamber, when the safety is removed. There is a whole multitude of things, but this is where the DSC 2 lets itself down. It is practically impossible for anyone to pass the DSC 2 without previous practical experience.
Also, try to be yourself on the day and enjoy yourself as a AW should be able to ask many of the questions during conversation and not make you feel like you are under a spotlight.
Hope this helps.
If you need to go through it more detailed, then send me a PM and I will give you a contact number for me.
Cheers