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A scheduling algorithm assigns priority proportional to the waiting time of a process. Every process starts with priority zero (the lowest priority). The scheduler re-evaluates the process priorities every T time units and decides the next process to schedule. Which one of the following is TRUE if the processes have no I/O operations and all arrive at time zero?
- a)This algorithm is equivalent to the first-come-first-serve algorithm
- b)This algorithm is equivalent to the round-robin algorithm.
- c)This algorithm is equivalent to the shortest-job-first algorithm..
- d)This algorithm is equivalent to the shortest-remaining-time-first algorithm
Correct answer is option 'B'. Can you explain this answer?
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Verified Answer
A scheduling algorithm assigns priority proportional to the waiting ti...
The scheduling algorithm works as round robin with quantum time equals to T. After a process's turn comes and it has executed for T units, its waiting time becomes least and its turn comes again after every other process has got the token for T units.
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A scheduling algorithm assigns priority proportional to the waiting ti...
The answer is b because if same priority task come then the scheduler in other cases cannot decides who should be served first .. So the common solution is that to serve both the task at the same time for the equall amount of processor..
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A scheduling algorithm assigns priority proportional to the waiting ti...
Answer:
The given scheduling algorithm assigns priority to each process based on its waiting time. The longer a process waits, the higher its priority becomes. The scheduler re-evaluates the priorities of all processes at regular intervals of T time units.
To understand why this algorithm is equivalent to the round-robin algorithm, let's first understand the round-robin algorithm.
Round-Robin Algorithm:
The round-robin algorithm is a preemptive scheduling algorithm that assigns a fixed time quantum to each process in a cyclic manner. The scheduler selects the next process to execute based on its priority and executes it for a fixed time quantum. If the process is not completed within the time quantum, it is preempted and moved to the end of the queue.
Now, let's analyze the given scheduling algorithm and compare it with the round-robin algorithm.
1. Priority Assignment:
In the given scheduling algorithm, priority is assigned based on the waiting time of a process. The longer a process waits, the higher its priority becomes. This is similar to the round-robin algorithm, where priority is not explicitly assigned, but the order of execution is determined by the position of the process in the ready queue.
2. Re-evaluation of Priorities:
The given scheduling algorithm re-evaluates the priorities of all processes every T time units. This is similar to the round-robin algorithm, where after executing a process for a fixed time quantum, the scheduler re-evaluates the priorities of all processes and selects the next process to execute based on its priority.
3. No I/O Operations and All Processes Arrive at Time Zero:
The given scheduling algorithm assumes that there are no I/O operations and all processes arrive at time zero. This is also true for the round-robin algorithm, which assumes that there are no I/O operations and all processes are ready to execute from the beginning.
Conclusion:
Based on the above analysis, we can conclude that the given scheduling algorithm is equivalent to the round-robin algorithm. Both algorithms assign priority to processes based on their waiting time, re-evaluate priorities at regular intervals, and assume no I/O operations with all processes arriving at time zero.
The given scheduling algorithm assigns priority to each process based on its waiting time. The longer a process waits, the higher its priority becomes. The scheduler re-evaluates the priorities of all processes at regular intervals of T time units.
To understand why this algorithm is equivalent to the round-robin algorithm, let's first understand the round-robin algorithm.
Round-Robin Algorithm:
The round-robin algorithm is a preemptive scheduling algorithm that assigns a fixed time quantum to each process in a cyclic manner. The scheduler selects the next process to execute based on its priority and executes it for a fixed time quantum. If the process is not completed within the time quantum, it is preempted and moved to the end of the queue.
Now, let's analyze the given scheduling algorithm and compare it with the round-robin algorithm.
1. Priority Assignment:
In the given scheduling algorithm, priority is assigned based on the waiting time of a process. The longer a process waits, the higher its priority becomes. This is similar to the round-robin algorithm, where priority is not explicitly assigned, but the order of execution is determined by the position of the process in the ready queue.
2. Re-evaluation of Priorities:
The given scheduling algorithm re-evaluates the priorities of all processes every T time units. This is similar to the round-robin algorithm, where after executing a process for a fixed time quantum, the scheduler re-evaluates the priorities of all processes and selects the next process to execute based on its priority.
3. No I/O Operations and All Processes Arrive at Time Zero:
The given scheduling algorithm assumes that there are no I/O operations and all processes arrive at time zero. This is also true for the round-robin algorithm, which assumes that there are no I/O operations and all processes are ready to execute from the beginning.
Conclusion:
Based on the above analysis, we can conclude that the given scheduling algorithm is equivalent to the round-robin algorithm. Both algorithms assign priority to processes based on their waiting time, re-evaluate priorities at regular intervals, and assume no I/O operations with all processes arriving at time zero.
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A scheduling algorithm assigns priority proportional to the waiting time of a process. Every process starts with priority zero (the lowest priority). The scheduler re-evaluates the process priorities every T time units and decides the next process to schedule. Which one of the following is TRUE if the processes have no I/O operations and all arrive at time zero?a)This algorithm is equivalent to the first-come-first-serve algorithmb)This algorithm is equivalent to the round-robin algorithm.c)This algorithm is equivalent to the shortest-job-first algorithm..d)This algorithm is equivalent to the shortest-remaining-time-first algorithmCorrect answer is option 'B'. Can you explain this answer?
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