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Which of the following scheduling algorithms is non-preemptive?
- a)Round Robin
- b)First-In First-Out
- c)Multilevel Queue Scheduling
- d)Multilevel Queue Scheduling with Feedback
Correct answer is option 'B'. Can you explain this answer?
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Which of the following scheduling algorithms is non-preemptive?a)Round...
Round Robin - Preemption takes place when the time quantum expires First In First Out - No Preemption, the process once started completes before the other process takes over Multi Level Queue Scheduling - Preemption takes place when a process of higher priority arrives Multi Level Queue Scheduling with Feedback - Preemption takes a place when process of higher priority arrives or when the quantum of high priority queue expires and we need to move the process to low priority queue So, B is the correct choice.
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Which of the following scheduling algorithms is non-preemptive?a)Round...
Non-preemptive scheduling algorithms are scheduling algorithms in which once a process is allocated the CPU, it cannot be interrupted until it completes its execution or voluntarily releases the CPU. In other words, the CPU is allocated to a process and that process continues to execute until it finishes or performs an I/O operation.
Among the options provided, the non-preemptive scheduling algorithm is First-In First-Out (FIFO).
First-In First-Out (FIFO) Scheduling Algorithm:
The FIFO scheduling algorithm is the simplest and most intuitive scheduling algorithm. It operates on the principle of "first come, first served". In this algorithm, the process that arrives first is allocated the CPU first, and the subsequent processes are placed in a queue.
Example:
Let's consider an example to understand the FIFO scheduling algorithm. Suppose we have three processes P1, P2, and P3, arriving at different times and requiring different burst times.
Process | Arrival Time | Burst Time
P1 | 0 | 5
P2 | 1 | 3
P3 | 2 | 4
In FIFO, the CPU is allocated to the process that arrives first, so P1 will be allocated the CPU first because it arrives at time 0. Once P1 completes its execution, P2 will be allocated the CPU, and finally, P3 will be executed.
The average waiting time for this example is calculated as follows:
(0 + 5 + 8) / 3 = 4.33
Conclusion:
In conclusion, the non-preemptive scheduling algorithm among the provided options is First-In First-Out (FIFO). This algorithm allocates the CPU to the process that arrives first and continues to execute it until completion or until it voluntarily releases the CPU.
Among the options provided, the non-preemptive scheduling algorithm is First-In First-Out (FIFO).
First-In First-Out (FIFO) Scheduling Algorithm:
The FIFO scheduling algorithm is the simplest and most intuitive scheduling algorithm. It operates on the principle of "first come, first served". In this algorithm, the process that arrives first is allocated the CPU first, and the subsequent processes are placed in a queue.
Example:
Let's consider an example to understand the FIFO scheduling algorithm. Suppose we have three processes P1, P2, and P3, arriving at different times and requiring different burst times.
Process | Arrival Time | Burst Time
P1 | 0 | 5
P2 | 1 | 3
P3 | 2 | 4
In FIFO, the CPU is allocated to the process that arrives first, so P1 will be allocated the CPU first because it arrives at time 0. Once P1 completes its execution, P2 will be allocated the CPU, and finally, P3 will be executed.
The average waiting time for this example is calculated as follows:
(0 + 5 + 8) / 3 = 4.33
Conclusion:
In conclusion, the non-preemptive scheduling algorithm among the provided options is First-In First-Out (FIFO). This algorithm allocates the CPU to the process that arrives first and continues to execute it until completion or until it voluntarily releases the CPU.
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Which of the following scheduling algorithms is non-preemptive?a)Round Robinb)First-In First-Outc)Multilevel Queue Schedulingd)Multilevel Queue Scheduling with FeedbackCorrect answer is option 'B'. Can you explain this answer?
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