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Operating System

Chapter 1: Introduction to Operating System 

— Definition of Operating System.

— Evolution of operating systems – simple batch systems, multi-programmed batch systems, time sharing systems.

— Functions of an operating system

— Characteristics of Operating System

— Single user and multi-user operating systems

Open-source and closed-source operating systems.

Important Questions with their Answers of “Introduction to operating system”

— MCQs and Fill in Blanks

— Short term Questions

— Long Term Questions


Chapter 2: Process Overview

Definition of process, process states, process life cycle,

Process Control Block (PCB),

Process Scheduling – Scheduling queues,

Schedulers (short term, medium term and long term).

Dispatcher.

Context Switch.

Important Questions with their Answers of “Process Overview”

— MCQs and Fill in blanks

Short term Questions

Long Term Questions


Chapter 3: CPU Scheduling

  • CPU Scheduler,
  • Preemptive and non-preemptive scheduling.
  • Scheduling criteria – CPU utilization, Throughput, Turnaround time, Waiting time, Response time.
  • Scheduling Algorithms: First-Come-First-Serve, Shortest-Job-First, Priority Scheduling, Round-Robin.

Important Questions with their Answers of “CPU Scheduling”

  • MCQs and Fill in blanks
  • Short term Questions
  • Long Term Questions

Short term Questions of “Introduction to Operating System”

Qus 1: What is Operating System ?

Qus 2: What is Single-User Operating System ?

Qus 3: What is Multi-User Operating System ?

Qus 4: What are the objective of Operating System ?

Qus 5: What are the characteristics of Operating System ?


Qus 1: What is Operating System ?

Ans: Operating System is the system software which provides the interface between the users application and the computer hardware and controls and manages the overall resources of computer.

Qus 2: What is Single-User Operating System ?

Ans: Single-User Operating System is a system in which only one user can access the computer system at a time.

Qus 3: What is Multi-User Operating System ?

Ans: Multi-User Operating System is a system that allows more than one user to access a computer system at one time.

Qus 4: What are the objective of Operating System ?

Ans: The various objective of Operating System are given below:

  • Making a computer system convenient to use in an efficient manner
  • To hide the details of the hardware resources from the users
  • To provide users a convenient interface to use the computer system.
  • To act as an intermediary between the hardware and its users and making it easier for the users to access and use other resources.
  • Manage the resources of a computer system.
  • keep track of who is using which resource, granting resource requests, according for resource using and mediating conflicting requests from different programs and users.
  • The efficient and fair sharing of resources among users and programs.

Qus 5: What are the characteristics of Operating System ?

Ans: The various characteristics of Operating System are given below:

  1. An operating system is system software.
  2. The operating system is in charge of the computer.
  3. The operating system acts as a resource manager for the memory and or peripherals devices.
  4. Operating system provides security and protection.
  5. It provides services like reading from the disk, saving to disks, sending data to a printer.
  6. The operating system is always available for you until the computer is switched off.

 


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‘Operating System’ Practical

  1. To install and configure MS Windows 7/8/10 on a computer
  2. To get familiar with general Windows commands – ECHO, CLS, DIR, TREE, MD, CD, TYPE, RD, DEL, MOVE, COPY , REN, ATTRIB, COLOR, DATE, TIME, ERASE, FIND, FC, MORE, CMD, PATH, SYSTEMINFO, SHUTDOWN, TASKLIST, TASKKILL, VER, VOL, CHKDSK
  3. To use wildcard characters for copying, moving, renaming, and deleting files and directories in a given hierarchical directory structure under Windows’s command prompt.
  4. To get familiar with windows control panel components.
  5. To use Windows backup and restore features.
  6. To get familiar with commonly used Windows PowerShell cmdlets like Get-ChildItem, GetContent, Get-Command, Get-Help, Clear-Host, Copy-Item, Move-Item, Remove-Item, Rename-Item, Get-Location, Set-Location, Write-Output, Get-Process, Stop-Process.
  7. To write scripts in Windows PowerShell to automate tasks.