Hi chen "What will you study in a university"? this question pertains as to what course or major you are going to take when you enter a university. If you want to ask which university, your sentence should go like this "What university are you going to study"?

What will you study in the university. More probably, what will be your major field of study. You could say "I will be studying economics." You could also answer with more than one subject: "I will be studying computer science and English."

major

Jinan University