Category Archives: Operating System

Virtual Machine Architecture

Virtualization can be defined as the process of creating multiple copies of an object. A virtual machine is a virtualization of a machine. The software that creates multiple copies of a machine is called a virtual machine monitor (VMM) or a hypervisor. Each virtual machine have its own OS called ‘guest OS’ and the OS

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Processor Execution Modes

There are mainly three types of OS architecture models : Monolithic OS Layered OS Client-server or microkernel OS In every model, there are two modes of processor execution : the user mode and the system mode. Application programs run in the user mode whereas the operating system runs in the system mode. The system mode

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What is an Operating System?

When the system is switch on, the operating system is automatically loaded into the main memory and it takes control of the computer system. The operating system provides an interface to the user for interaction with the machine by way of managing files, executing a program, or printing an output etc. The software running on

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