Multi-Level Feedback Queue Concepts

The video tutorial explains the concept of multi-level feedback queues, focusing on solving the starvation problem found in multi-level queues. It introduces the feedback mechanism, which allows lower priority processes to gradually move up in priority, ensuring they get CPU time. The tutorial provides a detailed example of how processes are managed and executed in this system, highlighting the importance of not giving feedback to high priority processes. The goal is to ensure lower priority processes do not face starvation while high priority processes continue to run efficiently.

What is the main issue with multi-level queues that the feedback mechanism aims to solve?

• Starvation of low-priority processes

• High CPU usage

• Complex scheduling algorithms

• Excessive memory usage

How does the feedback mechanism help in reducing starvation?

• By using a single queue for all processes

• By gradually upgrading the priority of low-priority processes

• By increasing the priority of high-priority processes

• By decreasing the CPU time for all processes

In the multi-level feedback queue, what happens when a low-priority process is upgraded?

• It is moved to a higher-priority queue

• It is downgraded to a lower-priority queue

• It is executed immediately

• It is terminated

Why don't high-priority processes require feedback in a multi-level feedback queue?

• They are always executed first

• They are not important

• They are not affected by CPU scheduling

• They are executed last

What is the initial step for a batch process in a multi-level feedback queue?

• It is placed in the highest-priority queue

• It is executed immediately

• It is placed in the lowest-priority queue

• It is terminated

How is the execution time of a batch process managed in a multi-level feedback queue?

• It is executed all at once

• It is divided into smaller time quanta

• It is ignored

• It is executed in reverse order

What happens to a process after it uses its time quantum in a queue?

• It is moved to a lower-priority queue

• It is moved to a higher-priority queue

• It is executed again in the same queue

• It is terminated

Which algorithm can be used in the final queue of a multi-level feedback system?

• Priority Scheduling

• First Come First Serve

• Round Robin

• Shortest Job First

What is the main benefit of changing the queue of a low-priority process?

• It decreases process priority

• It increases process priority

• It ensures faster CPU access

• It reduces memory usage

What is the primary goal of using a multi-level feedback queue?

• To simplify scheduling

• To reduce memory usage

• To eliminate starvation

• To increase CPU usage