ladapo, you have to know a lot about about the bank. such things as the year it was incorp, the year it started active service rendering, the price of its IPO, the current price of its share in the cap. mkt, the mission and vision, the name of the MD/CEO, you must also be very familiar with your CV. finally, in addition to dressing v. coperately, you must be able to answer basic questions in your field of study.
good luck.

Thanks bro, I owe u one!