Class 9 Computer Science Chapter 2 Question Answer

Discover the secrets of Class 9 Computer Science Chapter 2 through our easy-to-follow question-answer guide. We’ve crafted simple explanations and solutions to help you understand the concepts better. Join us on a learning journey as we explore Class 9 Computer Science Chapter 2 Question Answer in a friendly and approachable manner.

OPERATING SYSTEM AND ITS IMPORTANCE

Chapter 2 Exercise Question Answer

1. Choose the correct option.

1. Which of the following is an operating system?

i. Windows

ii. Linux

iii. Unix

iv. All of these

Ans: iv. All of these.

2. Which Operating System is developed by CDAC, Chennai?

i. Windows

ii. BOSS

iii. Unix

iv. None of these

Ans: ii. BOSS.

3. Which OS has fixed deadlines?

i. Distributed

ii. Real-time

iii. Interactive

iv. Batch Processing

Ans: ii. Real-time.

4. Name a multiuser Operating system.

i. MS-DOS

ii. BOSS

iii. Unix

iv. None of these

Ans: iii. Unix.

5. Name a version of macOS.

i. Mojave

ii. High Sierra

iii. Sierra

iv. All of these

Ans: iv. All of these

6. In which year was Windows OS released?

i. 1980

ii. 1985

iii. 1983

iv. 1987

Ans: ii. 1985

2. Fill in the blanks.

1.  ____ is the founder of Microsoft Corporation.

Ans: Bill Gates.

2. An operating system is a program that acts as an ____ between a user and the hardware. 

Ans:  Interface

3. The operating system decides which job should use the ____ and for how long.

Ans: CPU.

4. A computer System works with _____ 

Ans: Software.

5. Windows is an example of ____ operating system.

Ans: Graphical User Interface (GUI).

6. Unix was originally developed in ____ by a group of AT&T employees.

Ans: 1970

3. State True or False.

1. Microsoft Windows had 15 versions since its first release in 1985.

Ans: False.

2. Linux is different from proprietary software like Windows, which can only be modified by the company that owns it.

Ans: True.

3. iOS is Apple’s mobile operating system.

Ans: True.

4. The latest version of Android is Unnati.

Ans: False.

5. Windows comes pre-loaded on most new PCs.

Ans: True.

6. macOS is Apple’s mobile operating system.

Ans: False. 

4. Short Answer Questions

1. What is an Operating System?

Ans: An operating system is a software program that acts as an intermediary between the hardware of a computer system and the user. It manages the hardware resources of the computer and provides a platform for running applications.

2. Mention the names of any two commonly used operating systems.

Ans: Two commonly used operating systems are Microsoft Windows and Linux.

3. When was the first version of Apple iOS released?

Ans: The first version of Apple iOS was released on June 29, 2007, along with the iPhone.

4. What do you mean by multitasking?

Ans: Multitasking refers to the ability of an operating system to execute multiple tasks or processes simultaneously. It allows users to run multiple applications or programs concurrently, switching between them seamlessly.

5. What is a real-time operating system?

Ans: A real-time operating system (RTOS) is an operating system designed to handle real-time applications that require precise and predictable timing and response to external events. It guarantees that tasks meet their deadlines, making it suitable for time-critical applications like process control and embedded systems.

6. What are time-sharing and distributive operating systems?

Ans: 

Time Sharing	Distributive Operating
Time-sharing operating systems allow multiple users to share the resources of a single computer simultaneously. Each user receives a small portion of the CPU time, and the operating system switches between users rapidly to provide the illusion of simultaneous execution.	Distributed operating systems manage a group of independent computers and make them appear to be a single computer system. They enable users to access remote resources and share files and peripheral devices across the network seamlessly.

5. Long Answer Questions

1. Explain any two functions of an Operating System.

Ans: Functions of an Operating System:

a. Memory Management: Operating systems manage the computer’s memory resources efficiently. They allocate memory space to different processes and applications, ensuring that each program gets the necessary memory to execute properly. Memory management also involves freeing up memory when it’s no longer needed and preventing programs from accessing each other’s memory spaces.

b. File System Management: Another crucial function of an operating system is managing files and directories on storage devices such as hard drives, SSDs, and flash drives. The OS provides a file system that organizes and controls access to files, directories, and other data stored on the disk. It handles tasks like creating, deleting, reading, and writing files, as well as maintaining file permissions and security.

2. Explain any two-operating system used in mobile phones

Ans: Operating Systems Used in Mobile Phones:

a. Android: Developed by Google, Android is the most widely used operating system in mobile phones. It is based on the Linux kernel and is designed primarily for touchscreen mobile devices such as smartphones and tablets. Android offers a customizable user interface, supports multi-tasking, and provides access to a vast ecosystem of apps through the Google Play Store.

b. iOS (iPhone Operating System): Developed by Apple Inc., iOS is the operating system exclusively used in Apple’s mobile devices, including the iPhone, iPad, and iPod Touch. iOS is known for its user-friendly interface, seamless integration with other Apple devices and services, and strong security features. It offers a smooth and consistent user experience and provides access to the Apple App Store, which hosts a wide range of applications tailored for iOS devices.

3. Write a short note on the Windows operating system.

Ans: Windows is a family of operating systems developed by Microsoft Corporation. It is one of the most widely used operating systems for personal computers, laptops, and servers. Windows provides a graphical user interface (GUI) that allows users to interact with their computers using visual elements such as windows, icons, and menus. It supports multitasking, allowing users to run multiple programs simultaneously, and provides a range of built-in utilities and applications for various tasks such as file management, web browsing, and multimedia playback. Windows also offers extensive compatibility with hardware devices and software applications, making it a popular choice for both home and business users.

4. Write a note on the operating systems created by Apple.

Ans: Apple has developed several operating systems for its various hardware platforms:

a. macOS: macOS is the primary operating system used in Apple’s desktop and laptop computers, such as the iMac, MacBook, and Mac Pro. It is known for its sleek design, intuitive user interface, and seamless integration with other Apple devices and services. macOS offers features such as Siri voice assistant, iCloud integration, and the Mac App Store for downloading applications.

b. iOS: As mentioned earlier, iOS is the operating system used in Apple’s mobile devices, including the iPhone, iPad, and iPod Touch. It provides a secure and user-friendly environment for running mobile apps, accessing the internet, and communicating with others.

5. What is BOSS?

Ans: BOSS is a Linux-based operating system developed by the National Resource Centre for Free/Open Source Software (NRCFOSS) of India. It is designed to meet the requirements of the Indian government, educational institutions, and the general public. BOSS aims to promote the use of open-source software and reduce dependency on proprietary operating systems. It includes support for multiple Indian languages and provides various applications and tools tailored for Indian users.

6. Write a short note on Bill Gates.

Ans: Bill Gates is an American business magnate, software developer, philanthropist, and co-founder of Microsoft Corporation, one of the world’s largest and most influential technology companies. Gates played a significant role in the personal computer revolution by co-founding Microsoft in 1975 with Paul Allen. He played a key role in developing the company’s flagship product, the Windows operating system, which became the dominant operating system for personal computers worldwide. In addition to his contributions to the technology industry, Gates is also known for his philanthropic efforts through the Bill & Melinda Gates Foundation, which focuses on global health, education, and poverty alleviation.

7. What is an Interactive Operating System? Where is it used?

Ans: An interactive operating system is a type of operating system that allows users to interact with the computer through a graphical user interface (GUI) or a command-line interface (CLI). Unlike batch processing systems, where users submit jobs and wait for the results, interactive operating systems enable users to interact with the system in real time, issuing commands, launching programs, and manipulating files and directories as needed.

8. What are the two important features that must be taken care of while maintaining a directory?

Ans: Two important features that must be taken care of while maintaining a directory are:

a. Integrity: It is crucial to maintain the integrity of the directory structure to ensure that files and directories are organized correctly and can be accessed efficiently. This involves preventing accidental or unauthorized modifications to the directory hierarchy and ensuring that file and directory permissions are properly enforced.

 b. Efficiency: Directory maintenance should be performed in a manner that optimizes system performance and resource utilization. This includes minimizing the time and resources required for directory operations such as file searches, creation, deletion, and modification. Efficient directory maintenance helps improve system responsiveness and overall usability.