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Which of the following may be an example of pre-emptive CPU scheduling?
- a)Switching from running to ready state
- b)Switching from running to waiting state due to an interrupt
- c)Termination of a process
- d)Unexpected abort () of a process
Correct answer is option 'A'. Can you explain this answer?
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Which of the following may be an example of pre-emptive CPU scheduling...
CPU-scheduling decisions may take place under the following four circumstances:
1. When a process switches from the running state to the waiting state.
2. When a process switches from the running state to the ready state.
3. When a process switches from the waiting state to the ready state.
4. When a process terminates. If no process is ready, a system-supplied idle process is normally run.
2. When a process switches from the running state to the ready state.
3. When a process switches from the waiting state to the ready state.
4. When a process terminates. If no process is ready, a system-supplied idle process is normally run.
- For situations 1 and 4, there is no choice in terms of scheduling. A new process (if one exists in the ready queue) must be selected for execution.
- There is a choice, however, for situations 2 and 3. When scheduling takes place only under circumstances 1 and 4, we say that the scheduling scheme is nonpreemptive or cooperative; otherwise, it is pre-emptive.
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Which of the following may be an example of pre-emptive CPU scheduling...
CPU-scheduling decisions may take place under the following four circumstances:
1. When a process switches from the running state to the waiting state.
2. When a process switches from the running state to the ready state.
3. When a process switches from the waiting state to the ready state.
4. When a process terminates. If no process is ready, a system-supplied idle process is normally run.
2. When a process switches from the running state to the ready state.
3. When a process switches from the waiting state to the ready state.
4. When a process terminates. If no process is ready, a system-supplied idle process is normally run.
- For situations 1 and 4, there is no choice in terms of scheduling. A new process (if one exists in the ready queue) must be selected for execution.
- There is a choice, however, for situations 2 and 3. When scheduling takes place only under circumstances 1 and 4, we say that the scheduling scheme is nonpreemptive or cooperative; otherwise, it is pre-emptive.
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Which of the following may be an example of pre-emptive CPU scheduling?a)Switching from running to ready stateb)Switching from running to waiting state due to an interruptc)Termination of a processd)Unexpected abort () of a processCorrect answer is option 'A'. Can you explain this answer?
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