It is a jolly good job that you don't have to be able to spell professional as well!!.
However, Dragonfly is correct in saying there is no set formula, so be yourself and don't fall into the trap of trying to be what you think they want and what you are not.
I found the CTC interview to be the fairest interview that I have ever had. It was an enjoyable experience not one to be dreaded.
Sagey - aka "grumpy chops"