CBSE Class 9 Foundation of Information Technology Chapter 6: Basic Concepts of Operating System NCERT Solutions

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NCERT Solutions PDF Class 9 PDF

This chapter provides a foundational understanding of Operating Systems (OS) for Class 9 students studying Foundation of Information Technology. It covers the fundamental role of an OS as an interface between users and hardware, explaining its essential functions like managing devices and processors. The solutions detail concepts such as buffering and data transfer methods. It also touches upon different types of operating systems, including the distinction between hard and soft real-time systems, and mentions popular OS families like Windows NT and Android. These NCERT Solutions are designed to help students grasp the core principles of operating systems, clarify doubts, and prepare effectively for their examinations by offering clear explanations and structured answers.

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BoardCBSE
ClassClass 9
SubjectFoundation of Information Technology
Session2026
LanguageEnglish
TypeNCERT Solutions
Chapter6. Basic Concepts of Operating System

Chapter summary

Chapter 6, 'Basic Concepts of Operating System,' for CBSE Class 9 Foundation of Information Technology, introduces students to the essential role and functions of an operating system. The NCERT Solutions cover the definition of an OS, its function as a user-hardware interface, and key processes like buffering and data transfer. It also differentiates between hard and soft real-time operating systems and lists common OS examples, aiding students in understanding the fundamental building blocks of computer systems.

Learning outcomes

  • Understand the definition and primary role of an operating system.
  • Identify the operating system as the first program to load.
  • Explain the concept of buffering in data management.
  • Describe different forms of data transfer.
  • Differentiate between hard and soft real-time operating systems.
  • Recognize common operating system families and examples.

Topics covered

Paper topics

  • Operating System Definition
  • User-Hardware Interface
  • System Software
  • Loading Process
  • Buffering
  • Data Transfer Forms
  • Windows NT Family
  • Android OS
  • Device Management
  • Processor Management
  • Hard Real-Time OS
  • Soft Real-Time OS

Important topics

  • Definition and Role of Operating System
  • Functions of Operating System (Device and Processor Management)
  • Buffering Technique
  • Difference between Hard and Soft Real-Time OS
  • Common Operating Systems

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Questions and Solutions

Question 1.

What is an operating system?
Solution:

An operating system (OS) is a crucial piece of system software. Its primary function is to act as an intermediary, facilitating communication and interaction between the computer user and the underlying hardware resources. The OS provides a platform and a set of services that enable the computer to operate efficiently and allows other software applications to run.

Question 2.

Which is the first program that loads in memory?
Solution:

When a computer is powered on, the operating system is the very first program that gets loaded into the computer's main memory (RAM). This initial loading process is essential because the OS needs to be active to manage the hardware and prepare the system for further operations.

Question 3.

What do you mean by buffering?
Solution:

Buffering is a technique used in computing where a temporary storage area in memory, known as a buffer, is utilized to hold data. This is particularly useful when there are differences in the speed of data transfer between different components or processes, helping to synchronize their operations and prevent data loss.

Question 4.

Data can be transferred in which form?
Solution:

Data can be transferred between different components of a computer system in various forms or units. These can include individual characters, groups of characters forming words, fundamental units like bytes, larger collections of bytes known as blocks, or structured sets of data called records.

Question 5.

Is Windows NT a family of an operating system (s)?
Solution:

Yes, Windows NT is indeed a family of operating systems. Developed and released by Microsoft in July 1993, the 'NT' in Windows NT stands for 'New Technology'. This family formed the basis for many subsequent Microsoft operating systems, including Windows 2000, XP, Vista, 7, 8, 10, and 11.

Question 6.

Name any two commonly used operating systems.
Solution:

Two commonly used operating systems are:

  1. Windows 7
  2. Windows XP

(Note: While Windows 7 and XP are examples, modern commonly used OS include Windows 10, Windows 11, macOS, and various Linux distributions.)

Question 7.

Who released the first Android OS Astro?
Solution:

The first Android operating system, codenamed 'Astro', was released by Google on September 20th, 2008. This marked the beginning of the Android mobile operating system, which has since become widely popular.

Question 1.

State any two functions of operating system.
Solution:

Two key functions of an operating system are:

  1. Device Management: Computers have components like the CPU and Input/Output (I/O) devices that operate at very different speeds. The operating system's role is to manage these devices effectively, ensuring that the faster CPU is kept busy with processing tasks and that there is a balance in operations between the CPU and various I/O devices. It handles the allocation and deallocation of devices to processes.
  2. Processor Management: A process is essentially an application program that is currently in a running state. Processor management involves the OS activities related to planning, scheduling, monitoring, and executing these processes. During execution, each process requires resources such as CPU time, memory space, and access to files and I/O devices. The OS ensures these resources are allocated efficiently and fairly among competing processes.

Question 2.

Differentiate between hard and soft real-time operating systems.
Solution:

The key differences between hard and soft real-time operating systems are:

Hard Real-Time OS Soft Real-Time OS
Guarantees that critical tasks will complete within their specified, strict deadlines. Missing a deadline is considered a system failure. Prioritizes real-time tasks over others, but occasional, minor deadline misses are tolerable and do not lead to catastrophic system failure.
Requires that all delays within the system, from data retrieval to task completion, must be bounded and predictable. While aiming for timely completion, the delays in the kernel are not as strictly bounded as in hard real-time systems.
Tasks are typically periodic and must be executed within precise time intervals. Tasks are often scheduled in the background and run during the processor's idle time, or they may have less stringent timing requirements.

Common mistakes

  • Confusing the role of system software with application software.
  • Not clearly distinguishing between the characteristics of hard and soft real-time OS.
  • Vague understanding of data transfer units and methods.

Revision tips

  • Focus on understanding the OS as a bridge between user and hardware.
  • Memorize the key functions of an operating system.
  • Pay close attention to the differences between hard and soft real-time systems.
  • Review the examples of operating systems provided.

Practice MCQs

Q1. What is the primary role of an operating system?

Q2. Which type of software is an operating system?

Q3. Buffering is a technique used for:

Q4. Which of the following is a characteristic of a hard real-time operating system?

Q5. Which company released the first Android OS 'Astro'?

Frequently asked questions

What is an operating system in simple terms?

An operating system is a fundamental software that manages your computer's hardware and allows you to run other programs. It acts as a bridge between you and the computer's physical components.

Why is the operating system considered the first program to load?

The operating system must be loaded into the computer's main memory when it starts up so that it can begin managing the hardware and preparing the system for user interaction and running other applications.

What is the purpose of buffering?

Buffering is used to temporarily store data in a memory area. This helps manage the speed differences between different computer components, like the CPU and I/O devices, ensuring smoother data flow.

What is the main difference between hard and soft real-time operating systems?

A hard real-time OS guarantees that critical tasks will complete within very strict deadlines, with no exceptions. A soft real-time OS prioritizes real-time tasks but allows for occasional minor delays.

How do these NCERT Solutions help with exam preparation?

These solutions provide clear, rewritten answers to all questions from Chapter 6, helping you understand key concepts like OS functions and types, and reinforcing your knowledge for exams.

Important links

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