Hedge Fund Interview fit questions

I’m going to have an interview for Research Analyst at Long/short value investing hedge fund. The initial phone screen is going to be a fit interview. What kind of questions they might ask and how to effectively answer them? They say the candidates should have a passion for value investing.
I have been following several stocks and wrote about them in my cover letter. Should I elaborate on them?
What hedge funds are looking for in candidates?

What kind of “a brief case” study can be given to candidates? Is it a regular stock pitch with investment thesis writing?
How to impress them?

Help anyone?