CBSE Class 9 Foundation of Information Technology Chapter 3: Computer Software NCERT Solutions

Computer software is essentially a set of instructions, procedures, and associated data that guides a computer on what tasks to perform and how to execute them. It is the non-physical component of a computer system that makes the hardware functional.

System software refers to a collection of programs that are designed to manage and control the internal operations of a computer. Its primary role is to make the best possible use of the computer's hardware resources and to provide a platform for application software to run.

An operating system (OS) is a fundamental type of system software. It acts as an intermediary or interface between the computer user and the computer's hardware. The OS manages hardware resources, provides essential services, and allows users to run application programs.

To enable the operating system to communicate with and control a printer, a special type of software called a device driver is required. The device driver translates the general commands from the OS into specific instructions that the printer can understand.

A compiler is a language processor that converts an entire program written in a High-Level Language (HLL) into machine language in a single operation. The resulting machine code can then be executed directly by the computer's processor.

Utility software is a type of system software that is designed to assist in the management, maintenance, and optimization of computer systems. It helps in tuning the operating system, managing hardware components, and supporting various application software functionalities.

Some common examples of utility software include:

• Data compression utilities: Software that reduces the size of files for easier storage or faster transmission.
• Virus protection utilities: Antivirus programs designed to detect and remove malicious software.
• Disk defragmentation utilities: Software that reorganizes data on a hard drive to improve access speed.

To protect your computer system from viruses and other malicious software, you use antivirus software. This type of utility software is specifically designed to detect, prevent, and remove computer viruses.

A text editor is a program designed to work with plain text characters only. It lacks the functionalities and tools required to interpret, manipulate, or display graphical image data. Therefore, it cannot be used for editing pictures, which require specialized image editing software.

An application software, often called an 'app', is a program designed to perform specific tasks or functions for the end-user. Unlike system software, which manages the computer itself, application software is used directly by users to accomplish particular goals, such as writing documents, browsing the web, or managing finances.

We use spreadsheets primarily to organize data in a tabular format, consisting of rows and columns. They are powerful tools for performing calculations, analyzing data, creating charts, and managing numerical information efficiently. Spreadsheets allow users to easily manipulate and interpret large sets of data.

A Database Management System (DBMS) is the software used to effectively manage large collections of data. It allows for the storage, retrieval, and manipulation of data while also controlling redundancy, ensuring data integrity, and providing controlled access to the data for various applications.