CPU Scheduling Operating System Concepts Essentials Chapter 6 Quiz

CPU scheduling

CPU–I/O Burst Cycle

CPU burst distribution

<p>Introduce CPU scheduling, describe various CPU-scheduling algorithms, discuss evaluation criteria for selecting a CPU-scheduling algorithm, and examine the scheduling algorithms of several operating systems.</p> Signup and view all the answers

<p>To represent the distribution of CPU bursts</p> Signup and view all the answers

<p>Meeting timing deadlines</p> Signup and view all the answers

<p>Selects from among the processes in ready queue and allocates the CPU to one of them.</p> Signup and view all the answers

<p>When a process switches from running to waiting state or terminates.</p> Signup and view all the answers

<p>Gives control of the CPU to the process selected by the short-term scheduler.</p> Signup and view all the answers

<p>The time it takes for the dispatcher to stop one process and start another running.</p> Signup and view all the answers

<p>Max CPU utilization, max throughput, min turnaround time, min waiting time, min response time.</p> Signup and view all the answers

<p>17</p> Signup and view all the answers

<p>3</p> Signup and view all the answers

<p>It refers to the situation where a short process is behind a long process, causing delay for the short process.</p> Signup and view all the answers

<p>Selects from among the processes in ready queue and allocates the CPU to one of them.</p> Signup and view all the answers

<p>The amount of time to execute a particular process.</p> Signup and view all the answers

<p>Process execution consists of a cycle of CPU execution and I/O wait.</p> Signup and view all the answers

<p>The CPU burst distribution is of main concern.</p> Signup and view all the answers

<p>To achieve maximum CPU utilization with multiprogramming.</p> Signup and view all the answers

<p>To discuss evaluation criteria for selecting a CPU-scheduling algorithm for a particular system.</p> Signup and view all the answers

<p>The CPU–I/O Burst Cycle.</p> Signup and view all the answers

<p>To describe various CPU-scheduling algorithms.</p> Signup and view all the answers

<p>The purpose of the dispatcher module is to give control of the CPU to the process selected by the short-term scheduler. It involves switching context, switching to user mode, and jumping to the proper location in the user program to restart that program.</p> Signup and view all the answers

<p>Dispatch latency is the time it takes for the dispatcher to stop one process and start another running. It represents the delay in switching the CPU from one process to another.</p> Signup and view all the answers

<p>The primary objectives of CPU scheduling are to maximize CPU utilization, increase throughput, minimize turnaround time, reduce waiting time, and minimize response time.</p> Signup and view all the answers

<p>The convoy effect refers to the situation where a short process is delayed behind a long process, leading to inefficient use of CPU resources. It is particularly relevant in scenarios involving one CPU-bound and many I/O-bound processes.</p> Signup and view all the answers

<p>The optimization criteria for CPU scheduling algorithms include maximizing CPU utilization, increasing throughput, minimizing turnaround time, reducing waiting time, and minimizing response time.</p> Signup and view all the answers

<p>The average waiting time for processes P1, P2, and P3 in FCFS scheduling, when they arrive in the order P1, P2, P3, is 17.</p> Signup and view all the answers

<p>The average waiting time for processes P1, P2, and P3 in FCFS scheduling, when they arrive in the order P2, P3, P1, is 3.</p> Signup and view all the answers

<p>Preemptive scheduling occurs when the CPU scheduling decisions take place when a process switches from running to ready state or from waiting to ready state. It allows for the interruption of a process's execution to allocate the CPU to another process.</p> Signup and view all the answers

<p>When a process switches from running to waiting state, CPU scheduling decisions must consider access to shared data, preemption while in kernel mode, and interrupts occurring during crucial OS activities.</p> Signup and view all the answers

<p>The role of the short-term scheduler is to select from among the processes in the ready queue and allocate the CPU to one of them. It is responsible for making quick decisions to ensure efficient process execution.</p> Signup and view all the answers