NSAA; 3x interviews.
Interview 1: personal statement; Interview 2: problem solving; Interview 3: problem solving.
Used YouTube videos.
Watch videos from the 'Science with Soph' YouTube channel
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: 3
Time between interviews: 1 hour
Length of interviews: 20 mins
Online interview: No
The first interview was more general; about me and my personal statement.
The second was about chemistry problems followed by physics.
The third was about physics problems followed by materials.
I watched this YouTube video about the NSAA: https://youtu.be/d0bU0M31Rl0
I would recommend watching the following videos about Cambridge applications from the 'Science with Soph' YouTube channel:
https://youtu.be/Dlm3ajtMQSk https://youtu.be/341IhFEC5vI https://youtu.be/CyOYXkQnlr8 https://youtu.be/OmA4najpKeA