operating system links together the hardware and software so that you can interact with the computer.
they have number of specific roles to ensure all of this happens
Resource Allocation loads programs by retrieving them from storage and placing instructions in main memory. it also gets the CPU to start processing these instructions.
it will assign resources like memory and cpu power to different programs to ensure they can run.
Secuirty provides features for keeping your computer system secure.
1.user accounts to control access to files
2.utility software such as anti-virus software & firewalls
3.Backup tools to ensure damaged data can be restored
the os organises data into files & folders this allows you to save ,load ,copy,rename,move & delete data.
it also detects errors in files
the os manages the input and output to hardware devices .
these devices require drivers that tell the os how to communicate with them
your os will have general drivers that work with most devices , though some will require specialist drivers
utility applications: small programs that perform single specific tasks ,usually involving managing system resources and improving performance. example utility applications include:
Disk Defragmenters :
As we delete and save new data our hard disk becomes "fragmented" . this means our data gets split up across different locations on the hard disk .
this slows down the hard disks performance .
The disk Defragmenter will regroup all of the data to improve performance
this filters data coming into and out of your computer over a network (like the internet). the firewall will block any traffic it thinks is suspicious .
this can help to stop hackers from breaking into your system for example
A software application that protects us against malware ,like viruses.
it does this by either
1.preventing it from coming into your system
2.detecting it on our system and deleting it
選擇要在Apple App Store上查看的Topgrade應用程序。