Licence (Bern)

Hi All
I need to exchange my South African license for a Swiss one.
As far as I know I will need to do a practical test along with handing in all the documents.
Can anyone tell me what will be expected from me during this practical? Do they just ask you to drive around a bit or do they test your parking as well. Do they ask you to do checks on your vehicle beforehand or ask a lot of questions during the practical?

Thanks
Laura