The correct answer is D. all of the above.
A hypervisor is a software that creates and runs virtual machines (VMs). VMs are software-based emulations of physical computers. They can run their own operating systems and applications, just like physical computers.
Hypervisors are used to improve the efficiency of computer hardware. They can be used to run multiple operating systems on a single physical computer, which can save money on hardware costs. Hypervisors can also be used to create isolated environments for running applications, which can improve security.
The goals of hypervisor design are to:
- Scalability: Hypervisors should be able to scale to support a large number of VMs.
- Reliability: Hypervisors should be reliable and should not crash or cause problems for the VMs that they are running.
- Isolation: Hypervisors should isolate VMs from each other, so that one VM cannot affect another VM.
These goals are all important for the successful design and implementation of hypervisors.