Feedback queuesa)are very simple to implementb)dispatch tasks according to execution characteristicsc)are used to favour real time tasksd)require manual intervention to implement properlyCorrect answer is option 'B'. Can you explain this answer?

Question

Answer

Understanding Feedback Queues
Feedback queues are a sophisticated scheduling mechanism used primarily in operating systems to manage task execution based on their characteristics and needs.
Key Characteristics of Feedback Queues:

Dynamic Task Management: Feedback queues dynamically adjust the priority of tasks based on their execution behavior. Tasks that require more CPU time are moved to lower-priority queues, while shorter tasks can ascend to higher-priority queues.
Execution Characteristics: This adaptability allows feedback queues to effectively handle different types of tasks, especially in environments with mixed workloads. They prioritize shorter tasks for quicker turnaround and lower latency, making them suitable for time-sensitive applications.
Real-Time Task Support: By favoring shorter, real-time tasks, feedback queues ensure that critical applications receive the CPU time they need without unnecessary delays. This is especially important in real-time systems where timing is crucial.
Reduced Manual Intervention: Unlike other scheduling methods that may require manual tuning and adjustments, feedback queues automatically adapt to the system's workload. This feature promotes efficiency and reduces the need for constant monitoring and intervention.

Conclusion:
In summary, feedback queues excel in dispatching tasks according to their execution characteristics. They provide a structured yet flexible approach to task management, making them particularly effective in environments where varying task types coexist. This mechanism enhances overall system performance by intelligently prioritizing tasks based on their needs, ensuring that both long-running and real-time tasks are handled efficiently.

Answer

Multilevel Feedback Queue Scheduling (MLFQ) keep analyzing the behavior (time of execution) of processes and according to which it changes its priority of execution of processes. Option (C) is correct.

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