Computer Science Engineering (CSE) Exam > Computer Science Engineering (CSE) Questions > Which of the following statements are true?I....
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Which of the following statements are true?
I. Shortest remaining time first scheduling may cause starvation
II. Preemptive scheduling may cause starvation
III. Round robin is better than FCFS in terms of response time
II. Preemptive scheduling may cause starvation
III. Round robin is better than FCFS in terms of response time
- a)I only
- b)I and III only
- c)II and III only
- d)I, II and III
Correct answer is option 'D'. Can you explain this answer?
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Verified Answer
Which of the following statements are true?I. Shortest remaining time ...
I) Shortest remaining time first scheduling is a pre-emptive version of shortest job scheduling. In SRTF, job with the shortest CPU burst will be scheduled first. Because of this process, It may cause starvation as shorter processes may keep coming and a long CPU burst process never gets CPU.
II) Pre-emptive just means a process before completing its execution is stopped and other process can start execution. The stopped process can later come back and continue from where it was stopped. In pre-emptive scheduling, suppose process P1 is executing in CPU and after some time process P2 with high priority then P1 will arrive in ready queue then p1 is pre-empted and p2 will brought into CPU for execution. In this way if process which is arriving in ready queue is of higher priority then p1, then p1 is always pre-empted and it may possible that it suffer from starvation.
III) round robin will give better response time then FCFS ,in FCFS when process is executing ,it executed up to its complete burst time, but in round robin it will execute up to time quantum. So Round Robin Scheduling improves response time as all processes get CPU after a specified time. So, I,II,III are true which is option (D). Option (D) is correct answer.
II) Pre-emptive just means a process before completing its execution is stopped and other process can start execution. The stopped process can later come back and continue from where it was stopped. In pre-emptive scheduling, suppose process P1 is executing in CPU and after some time process P2 with high priority then P1 will arrive in ready queue then p1 is pre-empted and p2 will brought into CPU for execution. In this way if process which is arriving in ready queue is of higher priority then p1, then p1 is always pre-empted and it may possible that it suffer from starvation.
III) round robin will give better response time then FCFS ,in FCFS when process is executing ,it executed up to its complete burst time, but in round robin it will execute up to time quantum. So Round Robin Scheduling improves response time as all processes get CPU after a specified time. So, I,II,III are true which is option (D). Option (D) is correct answer.
Most Upvoted Answer
Which of the following statements are true?I. Shortest remaining time ...
Shortest remaining time first scheduling may cause starvation:
- Shortest remaining time first (SRTF) scheduling is a preemptive scheduling algorithm where the process with the shortest remaining burst time is executed first.
- If there is a continuous arrival of new processes with short burst times, the longer processes may never get a chance to execute, causing starvation.
Preemptive scheduling may cause starvation:
- Preemptive scheduling allows a running process to be interrupted and another process to be executed.
- If a high-priority process keeps arriving continuously, the lower priority processes may never get a chance to execute, causing starvation.
Round robin is better than FCFS in terms of response time:
- First come first serve (FCFS) scheduling algorithm executes the processes in the order in which they arrive.
- Round robin (RR) scheduling algorithm executes the processes for a fixed time slice and then moves on to the next process in the queue.
- RR scheduling ensures that every process gets a chance to execute, reducing the waiting time and improving the response time compared to FCFS.
Therefore, all three statements are true, and option D is the correct answer.
- Shortest remaining time first (SRTF) scheduling is a preemptive scheduling algorithm where the process with the shortest remaining burst time is executed first.
- If there is a continuous arrival of new processes with short burst times, the longer processes may never get a chance to execute, causing starvation.
Preemptive scheduling may cause starvation:
- Preemptive scheduling allows a running process to be interrupted and another process to be executed.
- If a high-priority process keeps arriving continuously, the lower priority processes may never get a chance to execute, causing starvation.
Round robin is better than FCFS in terms of response time:
- First come first serve (FCFS) scheduling algorithm executes the processes in the order in which they arrive.
- Round robin (RR) scheduling algorithm executes the processes for a fixed time slice and then moves on to the next process in the queue.
- RR scheduling ensures that every process gets a chance to execute, reducing the waiting time and improving the response time compared to FCFS.
Therefore, all three statements are true, and option D is the correct answer.
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Which of the following statements are true?I. Shortest remaining time first scheduling may cause starvationII. Preemptive scheduling may cause starvationIII. Round robin is better than FCFS in terms of response timea)I onlyb)I and III onlyc)II and III onlyd)I, II and IIICorrect answer is option 'D'. Can you explain this answer?
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