2x interviews (1 hr each), 1x test
Generic physics and maths questions; some Engineering-specific questions
Mock interviews; summer school
Try your best, you can't know how it went
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.
My first activity was the
The interviews mostly consisted of generic physics and maths questions. The topics included graph plotting, refraction, pivot points. Other topics included physical turbine blades in jet engines and and the flight of paper aeroplanes. I also had to give a talk on my chosen topic (Nuclear energy) for around 5 minutes and was asked some questions on this.
I used online practice questions and my physics teacher gave me a
It is very difficult to tell if the interview has gone well or not, so if you try your best that is all you can do.