Operating System Functions

Study Notes

Process Management: Manage creation, execution, and termination of processes.
Memory Management: Allocate and deallocate memory for running programs.
File Management: Provide access to file systems, manage file creation, deletion, and modification.
Input/Output (I/O) Management: Manage input/output operations between devices and programs.
Security: Implement security measures to protect the system and user data.
Interrupt Handling: Handle interrupts generated by hardware devices.

Single-User Single-Tasking: One user, one task at a time (e.g., MS-DOS).
Single-User Multi-Tasking: One user, multiple tasks at a time (e.g., Windows, macOS).
Multi-User: Multiple users, multiple tasks at a time (e.g., Linux, Unix).
Multi-Processing: Multiple CPUs, multiple tasks at a time (e.g., Linux, Unix).
Real-Time: Prioritize tasks based on deadlines and time constraints (e.g., embedded systems).
Mobile: Designed for mobile devices (e.g., Android, iOS).

Manage creation, execution, and termination of processes through process management.
Allocate and deallocate memory for running programs through memory management.
Provide access to file systems, manage file creation, deletion, and modification through file management.
Manage input/output operations between devices and programs through input/output management.
Implement security measures to protect the system and user data.
Handle interrupts generated by hardware devices through interrupt handling.

Single-User Single-Tasking OS allows one user to perform one task at a time, e.g., MS-DOS.
Single-User Multi-Tasking OS allows one user to perform multiple tasks at a time, e.g., Windows, macOS.
Multi-User OS allows multiple users to perform multiple tasks at a time, e.g., Linux, Unix.
Multi-Processing OS allows multiple CPUs to perform multiple tasks at a time, e.g., Linux, Unix.
Real-Time OS prioritizes tasks based on deadlines and time constraints, e.g., embedded systems.
Mobile OS is designed for mobile devices, e.g., Android, iOS.

Multitasking allows the operating system to run multiple tasks concurrently.
Multi-User support allows multiple users to access the system simultaneously.
Portability enables the operating system to run on different hardware platforms.
Security measures protect the system and user data from unauthorized access.
Scalability enables the operating system to adapt to increasing system resources.