Answer / bharath

Many Definitions are there for Virtual Machine;

..A virtual machine in computer science is software that
creates an environment between the computer platform and
the end user in which the end user can operate software.

..A functional simulation of a computer and its associated
devices.

..A virtual machine is a machine completely defined and
implemented in software rather than hardware. It is often
referred to as a "runtime environment"; code compiled for
such a machine is typically called bytecode.

..A self-contained operating environment that behaves as if
it is a separate computer.

Answer / nitin

Virtual machine can be say like
Machine allowing to run Different OS instance on single base
OS instance by allocating Different hardware to different OS
to exploite available hardware resources efficiently

Ex. running RHEL5.0 (2Instance or more) & windows 2K3 (2
instance or more)
On single Base OS Of Linux or windows

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