Please enable JavaScript.
Coggle requires JavaScript to display documents.
SOFTWARE (UTILITY APPLICATIONS (RESTORING DATA (It is important to restore…
SOFTWARE
Memory and Storage
Allocating Memory
- The OS organises the use of main memory between programs and data files.
- Locates free memory in RAM and allocates this to the program.
Storage
- The OS manages the storage of data and files
- Unnecessary files are deleted
Types of processing
BATCH
- Data is processed in groups as the data is similar it inputs all data at once
eg payroll system
REAL TIME
- Data is processed immediately
eg air traffic control
MULTI-USER SYSTEMS
- Many users at different computers sharing the processor of a powerful computer(time sharing)
eg school
UTILITY APPLICATIONS
RESTORING DATA
- It is important to restore data because the data might get lost or damaged by for example a virus
TASK SCHEDULING
- The operating system schedules programs to run or update at a particular time eg every week
- Gives you a message before doing a update or whatever it needs to do
DATA BACKUP
FULL BACKUP - Every thing on the hard-drive is backed up
INCREMENTAL BACKUP- Only backs up the data that has been changed as full backup may take too long
DISK DEFRAG
- Large files on computers may not have a single block of space to hold a single file, so the computer breaks up a file into parts called fragments and puts free space to the back
- This helps speed up a program
Anti-virus software
- Anti virus software can be installed onto a computer to prevent viruses that might alter or delete stores data
Software updates are important because viruses are created all the time to take advantage of security flaws so software updates patch these security risks
-
-
-