Process Scheduling and Algorithms Overview

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What is the primary goal of scheduling algorithms in interactive systems?

Maximize throughput

Ensure proportionality

Minimize response time (correct)

Meet deadlines

Which metric is NOT typically used to evaluate the performance of batch job systems?

Turnaround time

Throughput

Response time (correct)

CPU utilization

What is the defining characteristic of real-time systems?

Meeting deadlines (correct)

Low response time

Short turnaround time

High throughput

Which scheduling algorithm is described as non-preemptive and assigns the CPU in the order that processes request it?

First-Come First-Served Signup and view all the answers

What does the term 'proportionality' refer to in the context of scheduling algorithms for interactive systems?

Users' inherent (but often incorrect) idea of how long things should take Signup and view all the answers

Which scheduling algorithm is designed to minimize the average waiting time for all processes?

Shortest Job First Signup and view all the answers

What is the primary goal of a scheduling algorithm for batch systems?

Maximize throughput Signup and view all the answers

Which of the following is NOT a goal of scheduling algorithms for interactive systems?

Maximizing CPU utilization Signup and view all the answers

What is the primary concern for scheduling algorithms in real-time systems?

Meeting deadlines to avoid data loss Signup and view all the answers

Which of the following is NOT a goal of scheduling algorithms across all systems?

Maximizing CPU utilization Signup and view all the answers

What is meant by the term 'proportionality' in the context of scheduling algorithms for interactive systems?

Meeting users' expectations for response times based on process priority Signup and view all the answers

In the context of scheduling algorithms, what is meant by 'balance'?

Keeping all parts of the system, including CPU and I/O devices, busy Signup and view all the answers

What is the main advantage of the first-come, first-served (FCFS) scheduling algorithm?

It is fair and easy to implement Signup and view all the answers

Which of the following best describes the disadvantage of FCFS scheduling?

It can lead to poor CPU utilization for I/O-bound processes Signup and view all the answers

How does the FCFS algorithm manage the ready queue?

It uses a single linked list to store processes Signup and view all the answers

When a new job arrives in the FCFS algorithm, where is it placed in the queue?

At the end of the queue Signup and view all the answers

What is the primary role of a scheduler in an operating system?

To allocate CPU time to processes in the ready state Signup and view all the answers

What happens when a blocked process becomes ready in the FCFS algorithm?

It is placed at the end of the queue Signup and view all the answers

Which of the following queues holds processes that are waiting for input/output operations?

Device queue Signup and view all the answers

Which of the following scenarios would be an example of the disadvantage of FCFS scheduling?

A system with a mix of CPU-bound and I/O-bound processes Signup and view all the answers

What is the primary function of the long-term scheduler?

To determine which programs are admitted into the system for processing Signup and view all the answers

Which of the following statements is true about a good scheduling algorithm?

It can improve perceived performance and user satisfaction Signup and view all the answers

What is the purpose of the ready queue in process scheduling?

To hold processes that are residing in main memory and ready to execute Signup and view all the answers

Which of the following queues holds processes that are newly admitted into the system?

Job queue Signup and view all the answers

What is the major disadvantage of the first-come first-served scheduling algorithm?

It can lead to indefinite postponement of some processes Signup and view all the answers

What is the key assumption made by the shortest job first algorithm?

Process run times are known in advance Signup and view all the answers

Why is shortest job first not always optimal for minimizing average waiting time?

It does not account for process arrival times Signup and view all the answers

What is the key difference between shortest job first and shortest remaining time next?

Shortest job first is non-preemptive, while shortest remaining time next is preemptive Signup and view all the answers

In the counterexample for shortest job first, what is the average waiting time when jobs are scheduled in the order B, C, D, E, A?

4.4 Signup and view all the answers

Which of the following is true about the first-come first-served scheduling algorithm?

It is non-preemptive Signup and view all the answers