Give me some data centers available in India ?

what is a Region in cloud computing?

Is it necessary to enable regions which are not available to us by default?

what is a hypervisor?

It is a software which is used to creates and run multiple virtual machines to run on a single physical hardware . And it act as a bridge between hardware and virtual machines.

can you name four cloud providers?

Amazon Web Service - Amazon
Azure - Microsoft
Google cloud Platform-Google
Oracle Cloud Infrastructure -Oracle