have not went for interview but got similar experience with other asset management companies. Basically the role is to analyse and interpret financial data. Hence you need to know how  basic investment stuff such as  Price Earnings ratio, dividend yield, earnings per share growth and macro indicators such as GDP etc. Also maybe test on question such as if you have 50k, how long will it take to grow to 200k if the rate of return is 3% p.a. You have ample time because it is either you know or don't know the questions.