The company will be expecting that you have done your research on the industry generally. You should be familiar with the bank's products and services - literature on these can be picked up at any branch. Read the banks brochures and annual reports - these may be in the careers information room.
Be aware of current trends in the market and try to find out what each bank is doing in these areas
Insurance and Mutual Fund sectors are competitiors to banking industry. Banking products are different than those prodcuts as banking products assure rewards on investment where as others can't gve any assurance.