i just wanted to know that do we need to complete all three course of padhai for receiving certificate ? or else we will get certificate for doing only data science course also .
No, we provide separate certificate for each course, and also the registrations for each course will be different.
For example, if you have registered for Data Science course and completed it, you will get the certificate for that specific DS course.
To register into another PadhAI course, you will have to pay (and enroll) separately.