Command Control Systems: Operating System Unit 2

What is the main objective of the course mentioned in the text?

To understand the architecture of an operating system

Which course outcome focuses on implementing process management policies and CPU scheduling?

CO2

What does CO4 in the course outcomes refer to?

Evaluating memory management and its allocation policies

Which program outcome emphasizes understanding the engineer's role in society?

The engineer and society Signup and view all the answers

Which program outcome relates to the ethical aspects of engineering?

Ethics Signup and view all the answers

Which aspect is NOT a part of the course outcomes based on the text provided?

Environmental sustainability Signup and view all the answers

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

Assigning CPU to the process with the smallest burst time Signup and view all the answers

What is the role of FCFS scheduling in SJF when two processes have the same next CPU burst length?

It breaks the tie and assigns CPU based on arrival time Signup and view all the answers

What distinguishes between Non-preemptive and Preemptive SJF schemes?

Whether a process can be interrupted before completing its CPU burst Signup and view all the answers

Why is Shortest Remaining Time First (SRTF) considered optimal?

It guarantees minimum average waiting time Signup and view all the answers

How does SJF Scheduling handle ties between processes with equal burst times?

It uses FCFS Scheduling to break the tie Signup and view all the answers

What is the main advantage highlighted for Shortest Remaining Time First (SRTF) Scheduling?

Guarantees minimum average waiting time Signup and view all the answers

What are the four main sections of a process in memory?

Stack, heap, text, data Signup and view all the answers

What is the primary goal of a CPU scheduling algorithm?

To maximize CPU utilization Signup and view all the answers

Which of the following is NOT a characteristic used to evaluate scheduling algorithms?

Fairness Signup and view all the answers

What is meant by throughput in the context of scheduling?

The amount of work completed in a unit of time Signup and view all the answers

What is the difference between turnaround time and response time?

Response time is the total execution time, turnaround time is submission to completion Signup and view all the answers

In a multiprogramming system, what does waiting time refer to?

The time a job waits for resource allocation when resources are contended Signup and view all the answers

Which of the following models maps many user-level threads to a single kernel thread?

Many-to-One Signup and view all the answers

In the One-to-One model, each user-level thread is mapped to:

A single kernel thread Signup and view all the answers

Which of the following statements is true about kernel threads?

They are supported by the kernel Signup and view all the answers

In the Many-to-Many model, if a user thread is blocked, what happens?

Other user threads can be scheduled to other kernel threads Signup and view all the answers

Which of the following operating systems uses the One-to-One model?

Windows NT/2000 Signup and view all the answers

Which of the following statements is true about user threads?

If one user thread blocks, the entire application blocks in the Many-to-One model Signup and view all the answers

What is the main characteristic of fixed priority scheduling?

It serves all foreground processes before background processes. Signup and view all the answers

In a multilevel queue scheduling system, how are processes typically categorized?

By process types such as system, interactive, batch, and student. Signup and view all the answers

What is a key characteristic of multilevel feedback queue scheduling?

Processes can move between queues based on their behavior. Signup and view all the answers

Which of the following statements about time slices in multilevel queue scheduling is correct?

Time slices are allocated based on process priority. Signup and view all the answers

What is the purpose of batch processing in an operating system?

To collect and process programs and data together. Signup and view all the answers

In a multilevel queue scheduling system, which process type is typically given the highest priority?

System processes Signup and view all the answers