Hey! It does totally vary and depends on the type of interview, as they say ‘informal’ or ‘formal’
An interview referred to as ‘informal’ by HR took an hour and involved around 9 Q’s, not all competency though, about my application too. The interviewees were quite friendly and chatty, talking about random things lol.
An interview referred to as ‘formal’ by HR took an hour as well, but there were around 16 Q’s, varying from Q’s around my application, uni, my interests, problem scenarios and what the auditor would do (I did auditing last yr, i’m lucky i remembered some stuff), a few quiz q’s, who is the first minister (was sooo not expecting this) got one wrong though lol.
Yea so just be prepared for everything and anything coz you’ll feel a lot more comfortable during the interview. Hope that helps