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With the round robin CPU scheduling in a time-shared system, ______.
- a)Using very large time slice degenerates into first come first serve algorithm
- b)Using extremely small time slices improves performance
- c)Using extremely small time slices degenerates into last in first out algorithm
- d)Using medium sized time slices leads to shortest request time first algorithm
Correct answer is option 'A'. Can you explain this answer?
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Most Upvoted Answer
With the round robin CPU scheduling in a time-shared system, ______.a)...
Explanation:
Round Robin CPU Scheduling:
- Round Robin is a CPU scheduling algorithm where each process is assigned a fixed time slice or quantum to execute.
- It is commonly used in time-shared systems where the CPU switches between processes at regular intervals.
Using Very Large Time Slice:
- When a very large time slice is used in round robin scheduling, it can degenerate into a first come first serve algorithm.
- This is because processes will be allowed to run for a long time before switching to the next process in the queue.
- As a result, processes that arrive first will get to execute for longer periods, leading to unfairness in scheduling.
Impact of Extremely Small Time Slices:
- Using extremely small time slices can cause the algorithm to degenerate into a last in first out algorithm.
- This is because the CPU will switch between processes so frequently that newer processes will keep getting a chance to execute before older processes.
- This can lead to starvation of older processes as they may never get a chance to complete their execution.
Conclusion:
- In a time-shared system with round robin CPU scheduling, using very large time slices can result in a first come first serve algorithm, which may not be ideal for fair process scheduling.
- It is important to choose an appropriate time slice size to ensure efficient and fair scheduling of processes in the system.
Round Robin CPU Scheduling:
- Round Robin is a CPU scheduling algorithm where each process is assigned a fixed time slice or quantum to execute.
- It is commonly used in time-shared systems where the CPU switches between processes at regular intervals.
Using Very Large Time Slice:
- When a very large time slice is used in round robin scheduling, it can degenerate into a first come first serve algorithm.
- This is because processes will be allowed to run for a long time before switching to the next process in the queue.
- As a result, processes that arrive first will get to execute for longer periods, leading to unfairness in scheduling.
Impact of Extremely Small Time Slices:
- Using extremely small time slices can cause the algorithm to degenerate into a last in first out algorithm.
- This is because the CPU will switch between processes so frequently that newer processes will keep getting a chance to execute before older processes.
- This can lead to starvation of older processes as they may never get a chance to complete their execution.
Conclusion:
- In a time-shared system with round robin CPU scheduling, using very large time slices can result in a first come first serve algorithm, which may not be ideal for fair process scheduling.
- It is important to choose an appropriate time slice size to ensure efficient and fair scheduling of processes in the system.
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Community Answer
With the round robin CPU scheduling in a time-shared system, ______.a)...
Explanation:
The round robin CPU scheduling algorithm is a time-sharing system where each process is executed for a fixed time slice called a time quantum. Once the time quantum expires, the CPU is preempted and the next process in the queue is executed. This process continues until all processes have been executed.
Now, let's analyze the statements given in the question:
A: Using very large time slice degenerates into first come first serve algorithm
- When a large time slice is used, each process is allowed to run for a longer duration before being preempted.
- This essentially means that the CPU is allocated to each process in a sequential manner, following the order in which they arrived.
- Therefore, using a large time slice in round robin scheduling effectively degenerates into the first come first serve algorithm.
B: Using extremely small time slices improves performance
- Using extremely small time slices can lead to a high overhead due to the frequent context switches between processes.
- Context switching involves saving the current state of a process and loading the state of the next process, which incurs additional time.
- This overhead can degrade the overall system performance, especially when the number of processes is large.
C: Using extremely small time slices degenerates into last in first out algorithm
- This statement is not accurate. Using extremely small time slices does not lead to a last in first out algorithm.
- In round robin scheduling, the order of execution is based on the arrival time of the processes, not the order in which they were added to the queue.
D: Using medium-sized time slices leads to shortest request time first algorithm
- This statement is also not accurate. The round robin scheduling algorithm does not prioritize processes based on their request time.
- Instead, it ensures that each process gets an equal share of the CPU's time by using a fixed time slice.
Therefore, the correct answer is:
A: Using very large time slice degenerates into first come first serve algorithm
The round robin CPU scheduling algorithm is a time-sharing system where each process is executed for a fixed time slice called a time quantum. Once the time quantum expires, the CPU is preempted and the next process in the queue is executed. This process continues until all processes have been executed.
Now, let's analyze the statements given in the question:
A: Using very large time slice degenerates into first come first serve algorithm
- When a large time slice is used, each process is allowed to run for a longer duration before being preempted.
- This essentially means that the CPU is allocated to each process in a sequential manner, following the order in which they arrived.
- Therefore, using a large time slice in round robin scheduling effectively degenerates into the first come first serve algorithm.
B: Using extremely small time slices improves performance
- Using extremely small time slices can lead to a high overhead due to the frequent context switches between processes.
- Context switching involves saving the current state of a process and loading the state of the next process, which incurs additional time.
- This overhead can degrade the overall system performance, especially when the number of processes is large.
C: Using extremely small time slices degenerates into last in first out algorithm
- This statement is not accurate. Using extremely small time slices does not lead to a last in first out algorithm.
- In round robin scheduling, the order of execution is based on the arrival time of the processes, not the order in which they were added to the queue.
D: Using medium-sized time slices leads to shortest request time first algorithm
- This statement is also not accurate. The round robin scheduling algorithm does not prioritize processes based on their request time.
- Instead, it ensures that each process gets an equal share of the CPU's time by using a fixed time slice.
Therefore, the correct answer is:
A: Using very large time slice degenerates into first come first serve algorithm
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With the round robin CPU scheduling in a time-shared system, ______.a)Using very large time slice degenerates into first come first serve algorithmb)Using extremely small time slices improves performancec)Using extremely small time slices degenerates into last in first out algorithmd)Using medium sized time slices leads to shortest request time first algorithmCorrect answer is option 'A'. Can you explain this answer?
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