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Whenever a process needs I/O to or from a disk it issues a ______________

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Whenever a process needs I/O to or from a disk it issues a ______________

(a) system call to the CPU

(b) system call to the operating system

(c) a special procedure

(d) all of the mentioned

The question was asked in my homework.

I would like to ask this question from Disk Scheduling topic in section Mass-Storage Structures of Operating System

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Best answer
Correct option is (b) system call to the operating system

Explanation: None.

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