A2-T15-Virtual Machine

A virtual machine is an _______ of an existing computer os within another computer os. 

• OS

• copy

• mirror

• emulation

Emulation software is called a _____

• Supervisor

• hypervisor

• emuvisor

• hyperlink

Which are limitations of Virtual Machines?

• Can only use compatable software on the host OS with the guest OS

• Less performance running a guest OS instead of original system

• Can be expensive to build

• Guest OS can impact anything outside the virtual machine

In a virtual machine, the ______ operating system controls the physical hardware.

• guest

• host

• secondary

• primary

What is the benefit of using a virtual machine for running old/legacy software?

• Compatibility with new computer system/hardware

• Cost and complexity issues

• Protection of host computer if something goes wrong

• Improved performance compared to the original system

What is the limitation of running a guest OS in a virtual machine?

• Improved performance compared to the original system

• Complex to manage and maintain

• Expensive for a large company

• You do not get the same performance running as a guest OS as you do when running the original system

virtual machines are useful for testing a new OS or new app because ?

• They will not crash the host computer if something goes wrong

• Improved performance compared to the original system

• Compatibility with new computer system/hardware

• Cost and complexity issues

What is the role of the hypervisor in a virtual machine?

• Manages the virtual hardware during the emulation

• Controls the actual physical hardware

• Runs the virtual machine software

• Monitors the virtual machine software

What does the guest OS believe when running in a virtual machine?

• It is the normal OS for the host computer

• It is controlling the virtual hardware

• It is running on an 'alien machine'

• It is running on a compatible system

What is the function of the virtual machine software in protecting the host computer and other virtual machines?

• Protection of host computer if something goes wrong

• Monitors the virtual machine software

• Controls the virtual hardware during the emulation

• Runs the virtual machine software