Virtual machines allow users to run separate operating systems on a single computer by partitioning the hardware resources. Each virtual machine has its own virtual CPU, memory, disk, etc. mapped to the physical computer. This allows testing software in different environments, trying new operating systems safely, and setting up office systems quickly. However, virtual machines use the same physical resources as the host computer, so running multiple virtual machines can slow down lower-spec computers that run out of RAM and swap to disk storage.

1. By: Samprit Patel

2. Content:
• Itroduction
•What is Virtual Systems?
• How do Virtual Machine Work?
• Example of A Virtual System.
• Use of Virtual System.
•Limitations of Virual System

3. Introduction
In software reviews, often a program is tested in a platform
virtual machine. If you are a programmer, you may use virtual machines to
see if your product runs safely in another operating system—for example,
the different versions of windows. Maybe you like to test and analyze
malware, and don't want to get your computer infected. This virtualization
can help.

4. What is VIRTUAL SYSTEM?
A virtual machine is a type of computer application used to create a
virtual environment, which is referred to as virtualization.
Virtualization : Virtualization is defined as a logical view
between computer hardware systems and the software used to operate them.

5. (a).: Non Virtual Machine
(b).: Virtual Machines
Fig.: Architectural Difference Non-Virtual and Virual Machine

6. How do Virtual System Works?
VMWare hosts each guest operating system in a separate, secure virtual
machine. Each virtual machine (VM) has its own virtual CPU, memory, disk,
etc. and all of the virtual hardware is mapped to your computer's real
hardware. Each virtual machine also comes complete with its own BIOS that
can be edited the same way you'd edit the real BIOS on the computer that
VMWare is running on. This lets you customize your virtual machines and
control all of the usual stuff that you can control via your PC's actual BIOS.

7. Example of A Virtual System.
JAVA VIRTUAL MACHINE

8. Use of VIRTUAL SYSTEM

Try new operating systems

Test your software

Set up an office quickly

Small Biz disaster recovery

Build kid boxes

Backup your system

Save Legacy Systems

9. Advantages
The most mature, proven, and comprehensive platform
High application availability
Wizard-based guides for ease of installation
Simple, streamlined management
Higher reliability and performance
Superior security
Greater savings
Affordability

10. Scope Of Improvement
If you are thinking this is going to eliminate the need for a better computer to
run more programs at the same time, etc.— I'm afraid you need to think again. Virtual
machines use the same memory, the same CPU, and same hard drive as your real, host
computer. This can be quite a problem, especially for computers with low specs.
For example: On my laptop, I have 2GB of memory. Usually, that is quite enough
to satisfy me, as often I only use about 50-55% of it. However, running two operating
systems, one on a virtual machine, can increase that to 90+%. With that amount of RAM
used, memory swapping might occur, and that slo`ws things down.
So just remember: If you don't have a new, high-end computer, virtual machines
can make things a bit slower. For me, most of the time running one is something of an
ordeal, because I have to shut down mostly unnecessary processes and services.

11. Conclusion
A virtual machine has many uses—security, trialing, studying. But it
also sucks up system resources, so it isn't an easy thing for some.

12. Thank You!