DD and now this year DS attend a catholic private school and their interviews for kindy were more like informal "chats" outlining the schools philosophies, teaching etc. They didnt really ask us any specific questions, more along the lines of "Is there anything we as parents expect from the school/teachers".

As for the kids, they were really just taken on tours of the school and given toys/colouring in to play with in the office. The principal then asked a couple of standard questions like "are you looking forward to starting school, what do you like to play with?" etc etc.

In our instance it was nothing too much to worry about. Oh they usually ask what you as a parent can contribute towards the school eg music or handyman skills come to mind.