Final interview prep

I’m currently trying to prepare for a final interview for a grad position. I’m at my wits end thinking of what I could possibly be asked in this interview and how I should prepare.

I’m a recent graduate with a relatively niche degree so unfortunately I don’t have much directly related experience. In the previous round, I pretty much exhausted all my work examples and stories to answer the behavioural questions.

My main focus is trying to prove that I’m competent and the right fit, especially because on paper it might not look that way.

Should I be preparing for more behavioural questions? Is it bad to reuse examples? What are the chances they’ll test my (limited) technical knowledge? Would greatly appreciate any insights or advice anyone may have, particularly if you’ve experienced applying for a role that isn’t typical for your degree/background.