Microsoft network operating system l
Types of network operating system
Because of its open license model, the Linux kernel code is available for study and modification, which resulted in its use on a wide range of computing machinery from supercomputers to smart-watches. It was soon merged with the GNU user space components and system software to form a complete operating system. When a hardware device triggers an interrupt, the operating system's kernel decides how to deal with this event, generally by running some processing code. Interrupts provide a computer with a way of automatically saving local register contexts, and running specific code in response to events. This is called a segmentation violation or Seg-V for short, and since it is both difficult to assign a meaningful result to such an operation, and because it is usually a sign of a misbehaving program, the kernel generally resorts to terminating the offending program, and reports the error. In the s, Apple Computer Inc. Steve Jobs , a co-founder of Apple Inc. Program execution Main article: Process computing The operating system provides an interface between an application program and the computer hardware, so that an application program can interact with the hardware only by obeying rules and procedures programmed into the operating system.
Typically, the transfer of control to the kernel is achieved by executing a software interrupt instruction, such as the Motorola TRAP instruction.
In the past, Windows NT supported additional architectures. In modern operating systems, interrupts are handled by the operating system's kernel.
The operating system is also a set of services which simplify development and execution of application programs. CPUs might have other modes similar to user mode as well, such as the virtual modes in order to emulate older processor types, such as bit processors on a bit one, or bit processors on a bit one.
Usually a NOS is a complete operating system with file, task and job management. In user mode, programs usually have access to a restricted set of microprocessor instructions, and generally cannot execute any instructions that could potentially cause disruption to the system's operation.
If a program tries to access memory that isn't in its current range of accessible memory, but nonetheless has been allocated to it, the kernel is interrupted in the same way as it would if the program were to exceed its allocated memory.
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