HSPS at Cambridge interview help??

Hi, im applying to HSPS at cambridge uni this year and was wondering if anyone could let me know more about the interview bc i can only find like one video on youtube about it...
hsps is a very broad course so can they literally bring up whatever they want and ask me about it??
for example i take sociology a level which is the main reason im applying for this course, will they only ask me questions related to my personal statement and the essays ive submitted or could they also ask me stuff relating to random sides of the course..?
do i need to be researching anthropology etc so i have stuff to talk about...