Question

operating system tends to isolate system hardware from user. how?
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Answer 1

Answer:

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Explanation:

This is the reason why only the control program is stored in main memory and the rest of the operating system is stored on disk. The operating system tends to isolate the hardware from the user. The user communicates with the operating system, supplies application programs and input data, and receives output results.

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Answer 2

The user communicates with the operating system, supplies application programs, and input data, and receives output results.

Explanation:

• By denying a user direct access to system hardware, and operating system isolates system hardware from the user.
• Most (almost all) modern computers divide the machine instruction set into user instructions (which can be used by any computer) and privileged instructions (which can only be used by supervisory or kernel-mode mode applications and are available to system-level system-level programming).
• The actual control of hardware, as well as access to all of the memory, is only available through privileged instructions, which application developers are not allowed to utilize, hence user programmers must count on system-level functions for these functions.