Yes, you can surely apply, no doubt.

yes,surely you can apply for bank jobs

person with any degree can apply for bank jobs

Person from any stream can apply for Banking Jobs as there is no specific criteria for educational stream. However, person specialized in Commerce or Mathematics or Economics; Post Graduate MBA Holders, Chartered Accountants and Chartered Financial Analysts get more preference in this field.After BCA , if you are not planning to study further then this is the one of the best option you are going to choose.Now a days banking sectors are grooming and exams are also conducting in very good way .

For Preparation :You can do it by yourself or from any good coaching institutions .Currently IBPS is conducting common test for Banks .

In IBPS exams you will not get too much tough questions, In these exams only thing is that you have to manage your time in exams.