Which of the following does not interrupt a running process?a)A deviceb)Timerc)Scheduler processd)Power failureCorrect answer is option 'C'. Can you explain this answer?

Question

Answer

Scheduler process doesn’t interrupt any process, it’s Job is to select the processes for following three purposes. Long-term scheduler(or job scheduler) –selects which processes should be brought into the ready queue Short-term scheduler(or CPU scheduler) –selects which process should be executed next and allocates CPU. Mid-term Scheduler (Swapper)- present in all systems with virtual memory, temporarily removes processes from main memory and places them on secondary memory (such as a disk drive) or vice versa. The mid-term scheduler may decide to swap out a process which has not been active for some time, or a process which has a low priority, or a process which is page faulting frequently, or a process which is taking up a large amount of memory in order to free up main memory for other processes, swapping the process back in later when more memory is available, or when the process has been unblocked and is no longer waiting for a resource.

Answer

Explanation:

A device:
- Devices such as a keyboard or mouse can interrupt a running process by sending signals to the processor.
- These signals are known as hardware interrupts and can cause the processor to temporarily suspend the current process and handle the interrupt.

Timer:
- A timer interrupt is a signal sent by a timer device at regular intervals.
- Timer interrupts can be used for various purposes such as scheduling tasks, updating system clocks, and preempting processes.

Scheduler process:
- The scheduler process is responsible for managing the execution of processes on a system.
- It decides which process should run next based on scheduling algorithms.
- The scheduler itself does not interrupt a running process; instead, it determines the order in which processes are executed.

Power failure:
- A power failure can cause a running process to be abruptly terminated if the system loses power.
- In such cases, the system may not have enough time to cleanly shut down processes, resulting in data loss and potential corruption.
Therefore, the correct answer is option 'C' - Scheduler process as it does not interrupt a running process but rather manages the execution of processes.

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