SEBA Class 9 Computer Science Textbook Solution Chapter 2

 

Explore the solutions chapter-wise:

SL. No.	Contents
Chapter 1	Basics of Computer System
Chapter 2	Operating System and Its Importance
Chapter 3	Office Application
Chapter 4	Introduction to Internet
Chapter 5	Ethics In it
Chapter 6	Database
Chapter 7	Coding and Its Importance
Chapter 8	Introduction to C Programming
Chapter 9	Exploring C Programming Language
Chapter 10	Recent Developments in It
Chapter 11	Case Studies Applications of it in Daily Use

Chapter 2: Operating System and Its Importance

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Short Answer Type Questions

1. What is an Operating System?

Ans. An operating system is the most important software that runs on a computer. It manages the computer’s memory and processes, as well as all of its software and hardware. It also allows users to communicate with the computer without knowing its language.

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

Ans. The commonly used operating systems are:

Windows Operating System and iOS Operating System

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

Ans. The first version of Apple iOS was released on 29 July 2007.

4. What do you mean by multitasking?

Ans. Multitasking is a feature of an operating system that allows a user to perform more than one task at the same time.

5. What is a real-time operating system?

Ans. A real-time operating system is one in which jobs have fixed deadlines and must be completed within those deadlines. The performance of the system depends on completing tasks on time.

Examples: LynxOS, Windows CE.

6. What is time-sharing and distributive operating system?

Ans.

Time Sharing OS: A time-sharing operating system allows multiple users or processes to share system resources like CPU and memory simultaneously by dividing time into small slots.

Distributive OS: A distributive operating system shares its workload across multiple servers. It distributes data and resources among different systems to achieve maximum efficiency.

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Long Answer Questions

1. Explain any two functions of an Operating System.

Ans.

Processor Management:

The operating system manages the CPU and decides which process will use it and for how long. It allocates the processor to a process and removes it when the task is completed. This helps in smooth execution of multiple programs.

Memory Management:

The operating system manages the main memory (RAM). It keeps track of used and free memory. It allocates memory to programs when needed and de-allocates it after use. This ensures proper and efficient use of memory.

2. Explain any two operating systems used in mobile phones.

Ans.

Android:

Android is a mobile operating system based on the Linux kernel. It is mainly used in smartphones and tablets. It is open-source and supports a wide range of applications. It provides features like multitasking and touch interface.

iOS:

iOS is developed by Apple and is used in iPhone, iPad, etc. It was released on 29 July 2007. It is known for its smooth performance, security, and user-friendly interface.

3. Write a short note on Windows operating system.

Ans. Windows is an operating system developed by Microsoft in the mid-1980s. It is one of the most popular operating systems in the world. It provides a graphical user interface, making it easy to use. It supports multitasking and allows users to run multiple programs at once. Versions include Windows 7, Windows 8, Windows 10, and Windows Vista. It is widely used in personal computers.

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

Ans. Apple has developed operating systems such as macOS and iOS.

macOS is used in Macintosh computers and provides a graphical user interface with efficient performance and security.

iOS is used in mobile devices like iPhone and iPad. It was first released on 29 July 2007. Apple operating systems are known for their design, reliability, and smooth functioning.

5. What is BOSS?

Ans. BOSS (Bharat Operating System Solutions) is an operating system developed by C-DAC, Chennai. It is based on Linux and is a free and open-source software. It is developed to promote the use of Indian software. It supports multiple Indian languages and is used in government and educational institutions. The latest version of BOSS is called Unnati.

6. Write a short note on Bill Gates.

Ans. Bill Gates (William Henry Gates III) is an American businessman, software developer, and philanthropist. He was born on October 28, 1955. He is the founder of Microsoft Corporation. He served as chairman, CEO, and chief software architect. He played an important role in the development of the Windows operating system and is also known for his charitable work.

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

Ans. An Interactive Operating System allows direct interaction between the user and the computer. It responds quickly to user commands and makes the system easy to use.

Uses:

It is used in personal computers, laptops, and systems like Windows and macOS. It is also used in games, simulations, and applications requiring user interaction.

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

Ans.

Freedom of Naming Files:

A user should be able to give any desired name to a file without worrying about duplication.

File Sharing and Access:

A user should be able to share files and access files created by other users, ensuring proper collaboration.