Which of the following allows multiple operating systems (guests) to run concurrently on a host
computer?

A.
Emulator

B.
Hypervisor

C.
Grid computing

D.
CP/CMS

Explanation:
A hypervisor is a virtualization technique that allows multiple operating systems
(guests) to run concurrently on a host computer. It is also called the virtual machine monitor
(VMM). The hypervisor provides a virtual operating platform to the guest operating systems and
checks their execution process. It provides isolation to the host’s resources. The hypervisor is
D is incorrect. CP/CMS is a time-sharing operating system of the late 60s and early 70s, and it is
computing refers to the combination of computer resources from multiple administrative domains
to achieve a common goal.