System Software (Describe the functions of system software, referring to…
Describe the functions of system software, referring to allocating the following
The OS organises the use of main memory between programs and data files
Data needs to be transferred from a HDD/SDD to main memory (i.e. RAM) before it can be used.
Locates free memory in RAM and allocates this to the program/file
The OS manages the storage of data and files
Unnecessary files can then be deleted
System software allocates processing time between running programs and the users.
Uses time slices. More important task gets more time slices.
System performance includes response time and processor usage.
Monitored by the system software
Describe the following tasks carried out by the utility applications
This is a program that carries out a specific task to assist the OS.
A computer stores its files on a disk, and even though large disks may not have a single continuous block of empty space to hold a single file, computers ‘break up’ a file into little parts, or fragments
This means that a hard disk has to search for all the files until it can recreate the file on screen
The operating system schedules programs to run at particular times
Task scheduling might be set to run a program at a set time
It can give you an alert message before executing a job
Data Backup and Restore
Data can be backup up to other hard disks, magnetic tape or to servers on the internet
When everything on a hard disk is backed up, it is known as a full backup
This will take a long time, and so we may choose to only backup the data when it has changed. This is called an incremental backup
WinZip and Malwarebytes Antimalware would be an example of utility software
Describe the role of antivirus software and the importance of regular updates
A virus is a malicious software program designed to copy itself onto a computer in order to obtain, alter or delete stored data
Antivirus software is responsible for detecting, blocking and quarantining computer viruses
Packaged or Tailored Software?