Which software creates and runs virtual machines?

Which software creates and runs virtual machines?

• A. Cloud Concepts
• B. Guest OS
• C. Virtualization
• D. Hypervisor

Answer: (D)

Creating and running virtual machines is handled by a hypervisor. The hypervisor sits between the physical hardware and the virtual machines, providing each VM with virtualized CPU, memory, storage, and network resources, and it decides how to share the real hardware among all VMs. There are two main types: Type 1 hypervisors run directly on the host hardware for efficiency and isolation, while Type 2 hypervisors run on top of a host operating system. The operating systems inside the virtual machines—the guest OSes—rely on the hypervisor to supply the virtual hardware rather than managing the hardware directly. Cloud concepts describe how VMs and services are delivered in the cloud, which may use hypervisors under the hood, but cloud concepts themselves aren’t the software that creates and runs VMs. Virtualization is the broader technique of creating virtual resources, while the hypervisor is the software that makes that possible by managing and executing the virtual machines.

Creating and running virtual machines is handled by a hypervisor. The hypervisor sits between the physical hardware and the virtual machines, providing each VM with virtualized CPU, memory, storage, and network resources, and it decides how to share the real hardware among all VMs. There are two main types: Type 1 hypervisors run directly on the host hardware for efficiency and isolation, while Type 2 hypervisors run on top of a host operating system. The operating systems inside the virtual machines—the guest OSes—rely on the hypervisor to supply the virtual hardware rather than managing the hardware directly. Cloud concepts describe how VMs and services are delivered in the cloud, which may use hypervisors under the hood, but cloud concepts themselves aren’t the software that creates and runs VMs. Virtualization is the broader technique of creating virtual resources, while the hypervisor is the software that makes that possible by managing and executing the virtual machines.