As any exam, it depends on the level and the pupil’s age. and how long it is supposed to take.
You could pair the students in order to perform a small conversation about the topics they should know. Or you can come up with a list of pre prepared questions they have to answer. You can also show them pictures and they have to speak about.
Have a look here, a link to the Cambridge diploma. (For children)
https://www.google.de/search?q=cambridge+exam+sample+for+starters
but there must also be for adults, if it is your case.