An Operating System (OS) is an interface that allows users to interact with a computer easily.
It efficiently manages limited memory and system resources.
A computer system consists of:
- Hardware
- Operating System (OS) to manage user programs
- CPU
- Memory
Roles of the Operating System
1. CPU Scheduling and Process Management
- Manages which process gets CPU ownership
- Handles creation and deletion of processes
- Allocates and reclaims resources
2. Memory Management
- Allocates appropriate memory to processes from limited memory space
3. Disk File Management
- Manages how files are stored on disk
- Disk includes HDD (Hard Disk Drive) and SSD (Solid State Drive)
4. I/O Device Management
- Controls data exchange between I/O devices (e.g. mouse, keyboard) and the computer
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