- PROCESSING OPERATING SYSTEM DRIVER
- PROCESSING OPERATING SYSTEM MANUAL
can be accessed by user applications by using device drivers. All the I/O devices such as mouse, keyboard, disk drive etc.
PROCESSING OPERATING SYSTEM DRIVER
Interface of the device and the device driver is device controller. To handle a specific device, operating system can be connected to different device drivers. Operating system handles many I/O devices such as mouse, keyboard, disk drive etc.
Operating System also deallocate memory from processes when process gets terminated or if process does not require it. All memory allocations are being tracked by operating system, means what part of memory are in use and what parts are empty. it allocates memory to the processes by using some algorithms like best fit, first fit, and worst fit. It allocates memory and switches the processes between disk and primary memory for execution whenever required.įollowing activities are performed by operating system for memory management. The role of Memory Management is very important in operating system. Processes that needs I/O device are sent to device queue. When the processes are ready to execute in the main memory, they are sent to ready queue. As the processes enter the system, they are queued under the job queues. To handle processes in process management many scheduling queues are used. To do this it uses different types of algorithms like The Operating system manages the processes, it assigns the processor to process the task ata time,which is termed as process scheduling. Operating system provides an environment to different types of application and programs in which they can perform their useful task, it itself doesnot provide any functionality. User application programs can only interact with the system hardware with the help of an operating system. Fundamental Of Computers And Programing In C. 
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PROCESSING OPERATING SYSTEM MANUAL
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