What do they even ask at callbacks

Alright yall. So I was DOJ or bust, but obviously had to pivot to biglaw, so I did not do biglaw in 1L and gave no clue how this process works other than career services said apply now. I am starting to get callbacks tho, and I’m not sure what they even ask? Is it just a vibe check 2.0 + explanation of why I want to be there or is it more situational questions? Much appreciated!