U5 - SYSTEM MANAGEMENT

Manages the computer system Contains the OS and Utility software

The operating system is a collection of programs that manage the system’s hardware, software and any peripherals It provides an interface between the hardware and any applications being run. First thing to run on the bootstrap loader

The point of human-computer interaction and communication. It enables the user to interact and input commands into an application.

GUI CLI MENU DRIVEN BIOMETRICS VOICE RECOGNITION

Used in old Ipods and TVs, options are selected by navigating menus. Easy to operate but can be tedious Requires little processing power

ANTIVIRUS FIREWALLS DEFRAGMENTATION COMPRESSION SYSTEM MONITORING TASK MANAGEMENT DISC REPAIR SYSTEM BACKUP

Prevents malware from loading Scans routinely to remove viruses

Monitors data coming from the internet onto the computer server, suspicious websites are flagged and not loaded

Software that rearranges data so that data isn’t split up. Provides quicker access and more efficient use of storage space

Reduces the sizes of files when archiving or sending in order to store. Either done through lossy or lossless methods

Keeps track of resources, the amount of free RAM, free hard drive space, CPU processing rate

Shows what processes are running and how much of the system’s resources they are taking up

Scans hard drive for issues and attempts to repair them

Schedules automatic backups

MANAGING PROCESSES MANAGING PERIPHERALS MANAGING SECURITY MANAGING PRINTING MANAGING THE BACKING STORE MANAGING RAM

The OS tells the CPU the order of tasks it should focus on, PRIORITISING. It maintains and schedules a QUEUE of processes. Ensure processes do not interfere with one another when multitasking

The OS deals with I/O signals A DEVICE DRIVER is used to carry out ‘handshaking’ and will then handle the translation of requests

SPOOLING - The OS maintains a queue of things to print

The OS creates files and folders Allows them to be opened, named and copied Stores files hierarchically

The OS can set up accounts with different levels of access, i.e guest accounts Keeps track of different passwords and permissions

The OS loads needed data into the RAM and ensures there is enough memory Moves data between main memory and secondary storage Makes sure data does not corrupt each other by preventing data from being stored in used memory locations.