hi,

well you have two option after completing b.com, either you have to go for job or higher study. for banking related exam like SBI PO, RBI you have to prepare for the exams earnestly to get success at the very first attempt. private banks like ICICI, hdfc , kotak mahindra hires for various official positions. your communication skill, presentation skills and problem solving skills are mainly evaluated for the recruitment test.

another option is you may do certification course in Investment banking , which has good career option.