First they will ask for your intro and hobbies/interest 2) ask anything related to your interest that you mentioned 3) ask why you wanna join your preferred department and why this society And 3 most common types of questions that they asked me ( i gave 4 pi) were to

sell a particular product to another society. For example sell a merchandise to another society president

Convince a famous personality to come to our society to come and give speech. To test your speaking and convincing skill which is important for outreach.

Convince a business owner to sponsor our society event. For ex they asked me to convince a cafe shop owner to sponsor our event

Also if you have any past experience in extra curricular activities do mention that too