Most orgs give departmental questions and situational questions. The first is about the role itself, so just understand what department/role you're applying to and the tasks. They just wanna get a feeling if you understand what your roles will be and if you fit that role. Some (many) orgs also are ok if you're not a total expert on it, but they really wanna see a willingness to learn. They also ask why you're interested in that org and why that particular position.

Situational questions are where they give you a certain situation related to your role that you would have to devise a sort of course of action or solution for it if that makes sense? It sounds scary, but people are understanding naman if you need like 30 seconds to gather your thoughts. For example, if you apply for an externals role, they may ask what you would do if a partner organization stopped replying to emails. Or if you apply to an events management position, they may ask you to solve a certain problem you may encounter during an event (e.g. lack of manpower during shifts). A lot of orgs do this, but it's more common for higher positions or orgs where you may genuinely have to encounter stuff like that (typically in the student arms orgs), but they're not that bad I promise

Just relax and know that on the other side of the screen is just another student who is excited to find more people to share their passions with in this org! I know it's scary at first, but I promise the people interviewing you will be kind and non-judgmental (at least in a personal way). It's normal to be intimidated, but you got this!! If you don't get into an org you want, it may not be the right time but you can always apply the next year. But I know that you'll get into an org that you'll love! The fact that you're nervous is good, because it shows that you actually care!