For the Management Associate position, they call it CMA, need a Master's degree in a financial related discipline, good TOEIC scores (min 750), preferably passed lots of financial tests, i.e., achieved many certificates.
Be ready to introduce yourself and answer questions in English, especially with the current focus on foreign, i.e., SE Asian markets.
Impressions DO matter, so dress professionally and be confident. Let the interviewers know you're aggressive but also coachable. As there may be a big pool of applicants and given the time constraint, group interviews are most likely so it wouldn't hurt to stand out a bit, but given the traditional culture at the bank, you don't want to go over the top, either.