20 Questions
What does the CPU scheduler do?
Allocates the CPU to a selected process in memory
When does non-preemptive scheduling occur?
When a process switches from running to waiting state
What is the CPU-I/O burst cycle?
A cycle of CPU execution and I/O wait
What is the dispatcher module responsible for?
Giving control of the CPU to the process selected by the short-term scheduler
What is dispatch latency?
The time it takes for the dispatcher to stop one process and start another running
What is the main goal of the First-Come, First-Served (FCFS) scheduling algorithm?
Minimizing waiting time
Why is the average waiting time often quite long under the FCFS policy?
Due to the order in which processes arrive
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
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
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
In CPU scheduling, when does non-preemptive scheduling occur?
When a process terminates
What is the main responsibility of the dispatcher module in CPU scheduling?
Stopping one process and starting another running
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
What is the term for the time it takes for the dispatcher to stop one process and start another running?
Dispatch latency
When does preemptive scheduling occur in CPU scheduling?
When a process switches from ready to running state
What is the main goal of the First-Come, First-Served (FCFS) scheduling algorithm?
Minimizing waiting time
What is the average waiting time under the FCFS policy?
Generally quite long
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
What is a potential drawback of FCFS scheduling in a dynamic situation with fluctuating process types?
Convoy effect due to CPU-bound processes
Which optimization criteria is NOT typically associated with the First-Come, First-Served (FCFS) scheduling algorithm?
Minimizing turnaround time
Test your knowledge of basic concepts related to CPU utilization, CPU-I/O burst cycle, CPU burst distribution, and CPU scheduling decisions. This quiz covers topics such as multiprogramming, CPU scheduler, and process execution cycles.
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