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 delves into the fundamental concepts of Operating Systems (OS) for Class 9 students studying the Foundation of Information Technology. It explains what an operating system is, its role as an interface between users and hardware, and the crucial first program that loads into memory. The solutions cover essential OS functions like device and processor management, and differentiate between hard and soft real-time operating systems. Understanding these concepts is vital for grasping how computers manage resources and execute tasks efficiently. These NCERT Solutions provide clear, step-by-step explanations to help students prepare for their exams by reinforcing their understanding of core OS principles.

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Quick info

BoardCBSE
ClassClass 9
SubjectFoundation of Information Technology
Session2026
LanguageEnglish
TypeNCERT Solutions
ChapterChapter 6

Chapter summary

Chapter 6 of the Foundation of Information Technology syllabus for Class 9 focuses on the 'Basic Concepts of Operating System'. The NCERT Solutions provided here clarify the definition and purpose of an operating system, its role in managing computer hardware and software. It covers key functions such as device and processor management, explains the concept of buffering, and distinguishes between different types of operating systems like Windows NT and Android. The solutions also highlight the differences between hard and soft real-time operating systems, offering a foundational understanding for students.

Learning outcomes

  • Understand the definition and primary role of an operating system.
  • Identify the first program loaded into a computer's memory.
  • Explain the concept of buffering in data transfer.
  • Recognize different types and families of operating systems.
  • Describe the key functions of an operating system, including device and processor management.
  • Differentiate between hard and soft real-time operating systems.

Topics covered

Paper topics

  • Operating System Definition
  • Role of Operating System
  • First Program on Boot
  • Buffering
  • Data Transfer Forms
  • Windows NT Family
  • Android OS
  • Functions of Operating System
  • Device Management
  • Processor Management
  • Hard Real-Time OS
  • Soft Real-Time OS

Important topics

  • Definition and Role of Operating System
  • Device Management
  • Processor Management
  • Difference between Hard and Soft Real-Time OS
  • Key Functions of an OS

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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 interface, bridging the gap between the computer's hardware components and the user or application programs. The OS manages various resources and provides essential services to ensure the computer operates smoothly and efficiently.

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. This initial loading process is often referred to as booting, and it sets up the entire system for operation.

Question 3.

What do you mean by buffering?
Solution:

Buffering is a technique used in computing to manage data flow between different processes or hardware components that may operate at different speeds. It involves temporarily storing data in a dedicated memory area, known as a buffer, to smooth out the transfer process.

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, bytes (typically 8 bits), larger blocks of data, or entire records, depending on the context and the nature of the transfer.

Question 5.

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

Yes, Windows NT is indeed a family of operating systems. It was developed and released by Microsoft in July 1993. The 'NT' in Windows NT stands for 'New Technology', signifying a significant architectural advancement in Microsoft's operating system line at the time.

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 mentioned, modern systems often use Windows 10, Windows 11, or macOS and 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's journey.

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 that operate at very high speeds, while Input/Output (I/O) devices are often much slower. The operating system's role in device management is to manage these I/O devices effectively. It ensures that the faster CPU is not kept waiting unnecessarily and maintains a balance between the processing capabilities of the CPU and the operations of various I/O devices, keeping the system running efficiently.
  2. Processor Management: A process is essentially an application program that is currently in a running state. Processor management is a critical OS function responsible for planning, monitoring, and executing these processes. When a process runs, it requires various resources such as CPU time, memory space, access to files, and I/O devices. The OS allocates and manages these resources to ensure processes run smoothly and efficiently.

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 are completed precisely on time. Missing a deadline is considered a system failure. Prioritizes critical real-time tasks over others, but may tolerate occasional, minor deadline misses. The focus is on maintaining high priority until completion.
Requires all system delays (from data retrieval to task completion) to be strictly bounded and predictable. Tasks are typically periodic and must be processed within their defined intervals. While it aims to bound delays, it is less strict than hard real-time systems. Tasks are usually scheduled in the background and run during the processor's idle time, with priority given to critical operations when needed.

Common mistakes

  • Confusing the role of system software with application software.
  • Not clearly distinguishing between the functions of device management and processor management.
  • Difficulty in articulating the precise differences between hard and soft real-time systems.

Revision tips

  • Focus on understanding the core definition of an OS and its primary functions.
  • Create a table to compare and contrast hard and soft real-time operating systems.
  • Review the examples of operating systems mentioned to solidify recognition.
  • Practice explaining the concept of buffering in your own words.

Practice MCQs

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

Q2. Which of the following is considered the first program to load into a computer's memory upon startup?

Q3. Buffering is a technique used for:

Q4. Which operating system family, released in July 1993, stands for 'New Technology'?

Q5. In which type of real-time operating system is it guaranteed that critical tasks complete on time?

Frequently asked questions

What is an operating system in the context of Class 9 IT?

An operating system (OS) is a fundamental system software that manages a computer's hardware and software resources. It acts as an intermediary, allowing users and applications to interact with the computer's components without needing to know the intricate details of the hardware.

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

The operating system is the first program loaded into the computer's main memory when it is switched on because it is essential for initializing the hardware and making the system ready to run other applications and user commands.

What is the purpose of device management in an OS?

Device management by the OS aims to balance the speed differences between the fast CPU and slower I/O devices. It ensures efficient use of all connected devices and manages their operations.

How do hard and soft real-time operating systems differ?

A hard real-time OS guarantees that critical tasks are completed by their deadlines without fail. A soft real-time OS prioritizes critical tasks but may allow minor delays, focusing on overall system responsiveness rather than absolute deadline adherence.

What does 'buffering' mean in data transfer?

Buffering is a technique where data is temporarily stored in a memory area (a buffer) during transfer between different components or processes. This helps to smooth out differences in data transfer rates.

Important links

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