What is a hypervisor, and name two commonly used types?

What is a hypervisor, and name two commonly used types?

• A. A hypervisor creates and runs virtual machines; Type 1 (bare-metal) and Type 2 (hosted)
• B. A hypervisor is a network switch with virtual VLANs
• C. A hypervisor is a database engine
• D. A hypervisor is a file system

Answer: (A)

A hypervisor is software that enables virtualization by creating and managing virtual machines on a physical host. It allocates CPU, memory, storage, and other resources to each VM while keeping them isolated from one another, so multiple VMs can run on the same hardware without interfering. Two commonly used kinds are bare-metal, which runs directly on the physical hardware with no underlying operating system, delivering high performance and strong isolation; and hosted, which runs on top of an existing operating system, making setup easier but adding some overhead. Other options describe different technologies (like a network switch with virtual VLANs, a database engine, or a file system) and don’t provide the virtualization layer that a hypervisor delivers.

A hypervisor is software that enables virtualization by creating and managing virtual machines on a physical host. It allocates CPU, memory, storage, and other resources to each VM while keeping them isolated from one another, so multiple VMs can run on the same hardware without interfering.

Two commonly used kinds are bare-metal, which runs directly on the physical hardware with no underlying operating system, delivering high performance and strong isolation; and hosted, which runs on top of an existing operating system, making setup easier but adding some overhead.

Other options describe different technologies (like a network switch with virtual VLANs, a database engine, or a file system) and don’t provide the virtualization layer that a hypervisor delivers.