main two advantages of cloud computing is scalability and high availability , what exactly do these terms mean?

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

if a natural disaster happens ,how do services like netflix stay online ?

can you name four cloud providers?