My suggestion is to have a few things memorised for the common questions;
"What makes you want to work for <ACME Incorporated>?" --> Well, you are applying, so hopefully you know! Why would you want to work for a company you don't like? Hint, the answer is never 'for the money' or 'to have something to do' ...
"Give me an example of a challenge you have had professionally or personally and how you resolved that" --> This is a common one and I don't think there's a right answer. Just choose a moment in your life that's vaguely relatable about a time you had to compromise with someone else and solve a problem. It's a silly question about team-building but frankly it doesn't filter for anyone decent.
"What is your biggest weakness?" --> Give some vague answer like how you're too hard working and sometimes miss the big picture, but you've been trying to do better at that. Again, another stupid question that comes up far too often and I'm not convinced it filters for anyone other than class-A bullshitters.
"What are your strengths?" --> Hopefully you have an idea of where your skills are best applied, so just give an honest appraisal of these and talk about things you're learning.
"How did you start in engineering/what gets your interest in engineering?" --> Many people started early in engineering or did internships beforehand, so talk about these. If not, you probably still have some reason you did engineering in college or you're doing it as a career, so mention that.
"Do you have any other questions?" --> ALWAYS, ALWAYS have questions after the interviewer has asked theirs. In the ideal world, you thread your questions in with theirs, but I appreciate this is harder to do for a first few interviews. But an interview should be a conversation. You are interviewing them as well, because you are going to potentially spend years with these people.
Of course, you will also have common engineering ones, like, here is a circuit diagram, how does this circuit work, what is wrong with this circuit, how do I do this with <X> parts? So you should practice and understand common circuits and designs.