Natural Sciences Admissions Assessment (NSAA); 2x interviews
Entirely subject-based questions
Practised talking about the subject, including mock interviews
Completed timed practice questions; Revised from released curriculum
Keep calm: you're not expected to know everything
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.
Test taken:
Number of interviews: 2
Time between interviews: No wait
Length of interviews: ~20 minutes
Online interview: Yes
Started with some easy maths, then went on to more thought-provoking questions related to maths and physics. All subject-based: nothing about hobbies or anything.
They encouraged me to expand on answers and helped if I got stuck, it wasn't intimidating as they seemed to want me to do well
The university releases a curriculum of all the content which I revised from, as well as practice questions from random websites and NSAA prep questions books. The hardest thing is time pressure so timed practice is key
Try to keep calm and speak your thoughts in the interview, they're looking for potential to learn and adapt to things they tell you, and that you are okay with struggling and getting things wrong not just getting it all right