Hello,


The pattern of Banking exams consists of questions from 3 sections :
1. Reasoning Ability
2. Quantitative Aptitude
3. English Language
4. Computer Awareness
5. General Awareness
There is no specialized degree course that will help you in preparation of bank exams. Either you will have to take online coaching or offline coaching.
Beside that you can take any course for Bachelor's. I would suggest you to go for B.Sc Mathematics as this will help you little bit in quants section.

I hope this helps.