Briefly describe hos virtualization makes it possible to keep uptime percentage as high as possible.

What will be an ideal response?

The most popular reason for virtualizing is probably to keep uptime percentage as high as possible. Let's say you have a Web server installed on a single system. If that system goes down-due to hacking, malware, or so on-you need to restore the system from a backup, which may or may not be easily at hand. With virtualization, you merely need to shut down the virtual machine and reload an alternate copy of it.