Hello Ankit,
Though according to the basic eligibility of BANK PO exam graduation from a recognized university is sufficient for a PO job in the Generalist domain.
But, Computer skills would greatly improve your chances of getting the job and performing the duties so of course, it is necessary because nowadays without computer knowledge we can't do any work in this digital society so the computer courses are very important to do your works in banks.
There are many good computer courses related to Banking and other database jobs.
These are the course related to the banking. So you can apply for these course as your summer training. The duration of these courses is at least 3 months. The fees for these courses vary from 5 to 25 thousand.
Hope this helps.
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile