Hi Sukanya,

The one word answer is No. +2 is not a requirement for bank PO exam. The candidate appearing for the Bank PO must have a graduation degree in any stream with a minimum of 60% aggregate. Also, a student must have passed 10th or equivalent with a minimum of 60% too. for detailed eligibility-check refer to the following links:-

https://competition.careers360.com/exams/sbi-po
https://competition.careers360.com/exams/ibps-po
https://competition.careers360.com/articles/how-to-prepare-for-ibps-po
https://competition.careers360.com/articles/ibps-po-eligibility-criteria

Hope this helps.

Thank You.