Will my AT&T iPad from the USA work in India, or will I need a WiFi hot-spot to get an Internet connection?
I never tried but I think USA AT&T in India if work will work in roaming.
This is not about the connection for iPad. This is about overseas communications.
I think you have 2 options.
First one is use free Wi-fi or is buy a new sim card for you ipad from a Indian company.