3.0 Applications and Software
3.1 Explain the purpose of operating systems.
An operating system (OS) is a software that manages computer hardware and software resources and provides common services for computer programs. It acts as an interface between the user, the hardware, and the applications running on the computer. Some of the primary purposes of an operating system include:
1. Resource Management: The operating system manages the computer's hardware resources, such as memory, CPU, disk space, and input/output devices, to ensure that all programs and applications running on the computer get the resources they need.
2. Memory Management: The OS is responsible for allocating memory to running programs, ensuring that each program gets the necessary memory to operate effectively.
3. File Management: The operating system provides an interface for creating, modifying, and deleting files and directories, and manages the file system on the computer's storage devices.
4. User Management: The operating system enables multiple users to log in to the computer, manage user accounts, and control access to the computer's resources.
5. Process Management: The operating system manages the running processes on the computer, ensuring that each process gets the resources it needs to run effectively.
6. Security: The operating system provides security features such as user authentication, access control, and data encryption to protect the computer and its data from unauthorized access.
7. User Interface: The operating system provides a graphical user interface (GUI) or a command-line interface (CLI) to interact with the computer and run applications.
Overall, the operating system plays a critical role in managing the computer's resources and providing an environment for applications to run smoothly and efficiently.
Interface between applications and hardware