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16 Questions

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CPU Scheduling in Operating Systems

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Questions and Answers

Under which circumstances does preemptive scheduling take place?

When a process switches from the waiting state to the ready state

When a process terminates

When a process switches from the running state to the ready state

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

What is the primary objective of CPU scheduling?

Minimize CPU utilization

Minimize memory utilization

Maximize CPU utilization (correct)

Maximize memory utilization

In nonpreemptive scheduling, when does the process release the CPU?

When it terminates (correct)

When it switches from running state to ready state

When it switches from running state to waiting state

When it switches from waiting state to ready state

What is the effect of higher CPU utilization on a heavily loaded system?

Higher CPU utilization increases system performance Signup and view all the answers

What is the basis of multiprogrammed operating systems?

Switching the CPU among processes Signup and view all the answers

What is the distinguishing feature of preemptive scheduling over nonpreemptive scheduling?

Preemptive scheduling can interrupt a running process to allocate CPU to another Signup and view all the answers

What is the definition of turnaround time in CPU scheduling criteria?

The sum of periods spent waiting to get into memory, waiting in the ready queue, executing on the CPU, and doing I/O Signup and view all the answers

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

It often results in long average waiting times Signup and view all the answers

How is CPU allocated in Priority Scheduling?

To the process with the highest priority Signup and view all the answers

What is the primary focus of Shortest-Job-First (SJF) Scheduling?

Minimizing the average waiting time for a given set of processes Signup and view all the answers

What is the definition of response time in CPU scheduling criteria?

The time from the submission of a request until the first response is produced Signup and view all the answers

What is the primary drawback of using FCFS scheduling?

It frequently leads to high average waiting times Signup and view all the answers

What is the key challenge with implementing Shortest-Job-First (SJF) scheduling?

Predicting the process value accurately Signup and view all the answers

In which type of scheduling are equal-priority processes scheduled in FCFS order?

Priority Scheduling Signup and view all the answers

What does Min Waiting Time represent in CPU scheduling criteria?

The sum of periods spent waiting in the ready queue Signup and view all the answers

What represents Max CPU utilization – Throughput in CPU scheduling criteria?

(6 + 0 + 3) / 3 Signup and view all the answers