how much tech knowledge we need to know?

I'm currently a second year at a target school with 3.8 GPA double major in Art History and Economics.
Planning to apply for 2017 Summer Analyst.
I'm really worried about the tech questions in interviews, because given my background, I have not had any econ/finance course before college. And because I'm planning to graduate in 3 years, until now I'm only taking Microecon Principles. I feel that I know none of the tech questions.
So just wondering, how much tech knowledge we really need to know in order to get a Summer Analyst position in the first tier IB?
Appreciate any thoughts!