Clocks (also called timers) are essential to the operation of any multiprogramme

Question

Clocks (also called timers) are essential to the operation of any multiprogrammed system. They maintain the time of day, and prevent one process from monopolizing the CPU. How are clocks implemented? when a piece of quartz crysl Quiz: Exam II | cut and mounted, it can be made to generate a periodic signal of very great accuracy: using electronics this base signal can be multiplied by a small integer to provide synchronizing signal and to cause CPU interrupts the clock is entirely implemented in software including maintaining the time of day, preventing processes from running too long, and accounting for CPU usage the system clock is implemented in very similar way as people's watches the clock driver simulates multiple physical clocks with a single virtual clock to achieve watch-dog timers

Explanation / Answer

The answer is option a

Explaination:

The system clock is been implemented using a interval timer which continuously interrupts the CPU. It starts executing the timer interrupt service routine periodically. It is implemented using the simple counter which handles other periodic housekeeping tasks similar to preemption. It will return to the task CPU was performing before the interruption.

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