1x 30/40 minute interview, 1x 45 minute test
Books from personal statement, submitted essay, general discussion
I didn't have any!
Keep calm, be friendly and polite
Remember this advice isn't official. There is no guarantee it will reflect your experience because university applications can change between years. Check the official Cambridge and Oxford websites for more accurate information on this year's application format and the required tests.
Also, someone else's experience may not reflect your own. Most interviews are more like conversations than tests and like, any conversation, they are quite interactive.
When I arrived at the college, I was asked to wait in the Common Room. Waiting was quite intense, as the room was full of other nervous applicants. I had an interview with three college
I remember
I basically had no preparation. As an international student, I had never met another person who had been interviewed by a university or written a personal statement in this way. I read a lot about it online, though, mostly on the Student Room and other similar pages. Most of it wasn't true.
Keep calm and remember to be friendly and polite.