CPU Scheduling Basics

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What does the CPU scheduler do?

Switches the CPU between user and kernel mode

Manages the input/output devices

Allocates the CPU to a selected process in memory (correct)

Selects processes from the disk

When does non-preemptive scheduling occur?

When a process switches from running to waiting state (correct)

When a process switches from waiting to ready state

When a process switches from running to ready state

When a process terminates

What is the CPU-I/O burst cycle?

A cycle of I/O execution and CPU wait

A cycle of CPU execution only

A cycle of CPU execution and I/O wait (correct)

A cycle of I/O execution only

What is the dispatcher module responsible for?

Giving control of the CPU to the process selected by the short-term scheduler Signup and view all the answers

What is dispatch latency?

The time it takes for the dispatcher to stop one process and start another running Signup and view all the answers

What is the main goal of the First-Come, First-Served (FCFS) scheduling algorithm?

Minimizing waiting time Signup and view all the answers

Why is the average waiting time often quite long under the FCFS policy?

Due to the order in which processes arrive Signup and view all the answers

In a dynamic situation with one CPU-bound process and many I/O-bound processes, what undesirable effect may result from FCFS scheduling?

Convoy effect, causing CPU and device utilization to decrease Signup and view all the answers

What happens when a CPU-bound process finishes its CPU burst in an FCFS scheduling environment?

The CPU sits idle until the CPU-bound process moves back to the ready queue Signup and view all the answers

Why does FCFS scheduling algorithm result in substantial variations in waiting time if the process CPU-burst times vary greatly?

Because of its simplicity in implementation Signup and view all the answers

In CPU scheduling, when does non-preemptive scheduling occur?

When a process terminates Signup and view all the answers

What is the main responsibility of the dispatcher module in CPU scheduling?

Stopping one process and starting another running Signup and view all the answers

In the CPU-I/O burst cycle, what does the CPU scheduler do?

Selects from among the processes ready to execute and allocates the CPU to one of them Signup and view all the answers

What is the term for the time it takes for the dispatcher to stop one process and start another running?

Dispatch latency Signup and view all the answers

When does preemptive scheduling occur in CPU scheduling?

When a process switches from ready to running state Signup and view all the answers

What is the main goal of the First-Come, First-Served (FCFS) scheduling algorithm?

Minimizing waiting time Signup and view all the answers

What is the average waiting time under the FCFS policy?

Generally quite long Signup and view all the answers

What scenario may result when using FCFS scheduling with one CPU-bound process and many I/O-bound processes?

Convoy effect with processes waiting for the CPU-bound process Signup and view all the answers

What is a potential drawback of FCFS scheduling in a dynamic situation with fluctuating process types?

Convoy effect due to CPU-bound processes Signup and view all the answers

Which optimization criteria is NOT typically associated with the First-Come, First-Served (FCFS) scheduling algorithm?

Minimizing turnaround time Signup and view all the answers

CPU Scheduling Basics

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Questions and Answers

What does the CPU scheduler do?

When does non-preemptive scheduling occur?

What is the CPU-I/O burst cycle?

What is the dispatcher module responsible for?

What is dispatch latency?

What is the main goal of the First-Come, First-Served (FCFS) scheduling algorithm?

Why is the average waiting time often quite long under the FCFS policy?

In a dynamic situation with one CPU-bound process and many I/O-bound processes, what undesirable effect may result from FCFS scheduling?

What happens when a CPU-bound process finishes its CPU burst in an FCFS scheduling environment?

Why does FCFS scheduling algorithm result in substantial variations in waiting time if the process CPU-burst times vary greatly?

In CPU scheduling, when does non-preemptive scheduling occur?

What is the main responsibility of the dispatcher module in CPU scheduling?

In the CPU-I/O burst cycle, what does the CPU scheduler do?

What is the term for the time it takes for the dispatcher to stop one process and start another running?

When does preemptive scheduling occur in CPU scheduling?

What is the main goal of the First-Come, First-Served (FCFS) scheduling algorithm?

What is the average waiting time under the FCFS policy?

What scenario may result when using FCFS scheduling with one CPU-bound process and many I/O-bound processes?

What is a potential drawback of FCFS scheduling in a dynamic situation with fluctuating process types?

Which optimization criteria is NOT typically associated with the First-Come, First-Served (FCFS) scheduling algorithm?

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