Adapted from the Funworks Exploring IT: Theory Grade 11 textbook. An easy to read table of "Definition and Description" for every section and every term. Each description coming straight out of the textbook to ensure maximum validity and accuracy. All units being examined are included.
IEB GRADE 12 INFORMATION TECHNOLOGY THEORY DEFINITIONS
IEB GRADE 10 INFORMATION TECHNOLOGY THEORY DEFINITIONS
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IEB GRADE 11 THEORY
DEFINITIONS
AUDREY HU
2020
, Definition Chapter1
Large circuit board which connects most important components
Motherboard: of computer, such as CPU
Chipsets: Set of chips used to connect components on motherboard
Controller: Circuitry responsible for managing a specific hardware part
Allows hardware subsystems to access system memory
DMA(direct memory access): independently of CPU
Connects the important components to the motherboard that
Northbridge: need immediate processing
Connects components that don’t need immediate processing to
Southbridge: the motherboard
Front side bus: Connects all components on motherboard
Transfers physical address of instruction or data between CPU
Address bus: and Ram
Transfers actual instruction or data that needs to be transferred
Data bus: between CPU and RAM
Control Bus: Carries commands between CPU and RAM
Practice of making comp components operate beyond stock
perform by manipulating frequency of what the component is
Overclocking: meant to run
CPU
1st function: Fetch: A program instruction from memory
2nd function: Decode: Understand the instruction using CPU instruction set
3rd function: Execute: The instruction using data
The result obtained back in the main memory or send to output
4th function: Store: device
Sends read or write signals to memory and address of the
Control unit: instruction to stored
Arithmetic unit: Where calculations and logic comparisons take place
Registers: Temporary memory locations
Stores blocks of program instructions and data that have been
Cache memory: pre-fetched from RAM in case needs to be used again
RAM: Stores programs currently in use
DRAM: Dynamic RAM. Refreshes constantly
Synchronises the refreshes with the CPU so that there is no wait
S(DRAM): time
DDR: Data is transferred twice as fast per every clock pulse
Graphics processing unit. Controls the displaying of images so
GPU: that the CPU doesn’t have to
Found in PCI expansion slot on motherboard used for playing or
Soundcard: reading sound files
Universal serial bus. Connects most external devices to a
USB: computer
High definition multimedia interface. All digital audio-video
HDMI: interface
Dard drive disk. Non-volatile storage device which stores digital
HDD: data on rapidly spinning platters that are magnetic
Seek time: Time taken for read\write head to find correct platter
GRADE 11 THEORY DEFINITIONS
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