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.
Number of interviews: 3
Skype interview: No
Interviews spread over 3 days
Length of interviews: 15 minutes each
We went through problems until we reached one I could not do, and then went about solving that one with the
I prepared for the
The single thing that helped greatly was having a