People coming from overseas have to go through mandatory quanrantine in India. Air travel is restricted. A ship with Chinese travelers was halted near coastline as per WHO guidelines recently.
It would be very surprising if they quarantined in time or strictly enough to prevent the virus from entering in significant numbers. Even societies with highly centralized control structures (Iran, Japan) weren't able to keep it out. I doubt a decentralized country like India with huge amounts of human movement without and within could do it, just as the US and EU couldn't.