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Question

UNIX operating system is based on-

A
Language structure
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B
Kernel approach
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C
Virtual machine
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D
Time sharing
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Solution

The correct option is D Kernel approach

UNIX operating system is based on kernel approach.

In a monolithic kernel, all OS services run along with the main kernel thread, thus also residing in the same memory area. This approach provides rich and powerful hardware access. Some developers, such as UNIX developer Ken Thompson, maintain that it is "easier to implement a monolithic kernel" than micro kernels.

The kernel is the essential center of a computer operating system (OS). A kernel is often contrasted with a shell, which is the outermost part of an OS that interacts with user commands. Kernel and shell are terms used more frequently in UNIX. A kernel is the central part of an operating system. It manages the operations of the computer and the hardware - most notably memory and CPU time.


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