(OS) Operating System
An operating system is a set of programs which acts as an interface between the user and the computer. The main system software is the operating systems, which starts up the computer and control its operation. Operating system manages the resource, resolves conflicts and tries to optimize the performance of the system. The user communicates with the computer through operating system commands and program instructions.
Operating System performs different Operations or Functions, They are:
1. Memory Management
2. Process Management
3. Device Management
4. File Management
5. Protection and Security
6. User interface or Command interpreter.
1. Memory Management
Performs functions like Allocate memory, Free Memory, Re-allocate memory to a program when a used block is freed, Keep track of memory usage,etc
2. Process Management
Performs functions like Control access to shared resources like file, memory I/O and CPU, Control execution of applications, Create, execute and delete a process, Cancel or resume a process,etc.
3. Device Management
Performs functions like Open, close and write device drivers. Communication, control and monitor the device drivers,etc.
4. File Management
Performs functions like Create and delete both files and directories, Provide access to files, Allocate space for files etc.
5. Protection and Security
Performs functions like OS protects the resource of system. User authentication, file attributes like read, write, encryption and back-up of data.
6. User interface or Command interpreter.
Performs functions like OS provides an interface between the user and the computer hardware.The user interface is a set of commands or a Graphical User Interface via which the user interacts with the application and the hardware.
An operating system is a set of programs which acts as an interface between the user and the computer. The main system software is the operating systems, which starts up the computer and control its operation. Operating system manages the resource, resolves conflicts and tries to optimize the performance of the system. The user communicates with the computer through operating system commands and program instructions.
Operating System performs different Operations or Functions, They are:
1. Memory Management
2. Process Management
3. Device Management
4. File Management
5. Protection and Security
6. User interface or Command interpreter.
1. Memory Management
Performs functions like Allocate memory, Free Memory, Re-allocate memory to a program when a used block is freed, Keep track of memory usage,etc
2. Process Management
Performs functions like Control access to shared resources like file, memory I/O and CPU, Control execution of applications, Create, execute and delete a process, Cancel or resume a process,etc.
3. Device Management
Performs functions like Open, close and write device drivers. Communication, control and monitor the device drivers,etc.
4. File Management
Performs functions like Create and delete both files and directories, Provide access to files, Allocate space for files etc.
5. Protection and Security
Performs functions like OS protects the resource of system. User authentication, file attributes like read, write, encryption and back-up of data.
6. User interface or Command interpreter.
Performs functions like OS provides an interface between the user and the computer hardware.The user interface is a set of commands or a Graphical User Interface via which the user interacts with the application and the hardware.
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