As you have asked about the vacancy for probationary officer (PO) in Oriental Bank of Commerce, I am giving you information about it, check below for the details
I want to tell you that currently there is no vacancy for PO in Oriental Bank of Commerce.
However, you can check its website regularly to know about it.
To check it, you can follow steps given below
Go to OBC website
Click on Recruitment, the page open look like


Here you will find the information when available.

Here I found following:

Joining of newly recruited SWO 'A' under CWE Clerk-V on 23.05.2016 (Batch-I)
Recruitment of Specialist Officers - 2016-17
Recruitment of Specialist Officers - 2015-16
Candidates Selected for Personal Interview - IT, Forex, Debt&Equity
Candidates Shortlisted for Personal Interview - Risk Management
Candidates Selected for Offer of Appointment - Risk,IT,Forex,Debt&Equity
Recruitment of Faculty Members - 2015-16
Candidates Shortlisted for Personal Interview - Faculty Member
Recruitment of Specialist Officers under CWE SPL-V (FY 2016-17)