Software (Describe the functions of system software (Processing time (Uses…
Describe the functions of system software
Unnecessary files can then be deleted
The OS manages the storage of data and files
Uses time slices. More important task gets more time slices.
System performance includes response time and processor usage.
System software allocates processing time between running programs and the users.
Locates free memory in RAM and allocates this to the program/file
Data needs to be transferred from a HDD/SDD to main memory (i.e. RAM) before it can be used.
The OS organises the use of main memory between programs and data files
Describe the following modes of processing
Data is processed immediately, output is processed quickly.
(Air traffic control, concert booking system)
Used in critical systems, where no delay is tolerated.
Many users at different computers sharing the processor of a powerful computer.
The OS switches between computers, giving a lot of processing power (a time slice) for a short time before going to the next in line.