Property of virtualization that allows entire virtual machines to be saved as file that can moved or copied like any other file is known as encapsulation
Encapsulation describes the concept of encapsulating information and the strategies that perform on that information right into a single unit, like a class in Java. This idea is likewise frequently used to cover the internal representation or state of an object from the outside. This is called information hiding.
The general concept of this mechanism is simple. For example, you've a property that is not visible from outside an object. You bind it to methods that provide read or write access. Encapsulation lets in you to hide specific information and control access to an object's internal state.
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