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8816458
Computer science
Descrição
Revision for year 10 Mock
Sem etiquetas
computer science
gcse
Mapa Mental por
Joseph Foster
, atualizado more than 1 year ago
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Criado por
Joseph Foster
mais de 7 anos atrás
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Resumo de Recurso
Computer science
ROM and RAM
RAM
RAM is the memory in which the computer stores data in current use
RAM is volatile becuase one the power is switched off, data inside of it is lost
ROM
ROM provides the computer with instructions that do not change
This is Non-Volatile
Cloud storage
Cloud computing is the term for processing your data on computer systems that belong to someone else, and accesingthem from the internet
Advantages: Access from anywhere with internet connection, Offices across the world can access the same files, disaster recovery is easier
Disavantages: You need a reliable internet connection and Someone else is keeping your files safe
Embedded systems
Embedded system is where a computer system is a part of a much bigger deviced
Examples: Traffic lights, watches, MRI scans and MP3 players
Systems Architeture
Arithmetic logic Unit(ALU)
The ALU performs mathmatical and logical operations required by the code then passes the result to them memory
Buses
A communication system within a computer that transfers data between components
Control unit
The component in the CPU that directs the operation of the processor, it controls the data movements around the processor
Clock
The Clock keeps everything in the CPU in time. The faster the clock speed the more instructions a CPU can execute per second
The Fetch-execute cycle
Fetch: The next instruction is fetched to the CPU from the main memory
Decode: The instruction is decoded to work out what it is
execute: The instruction is executed, this may mean write/read to/from main memory
Von Neumann
Anexos de mídia
220px Von Neumann Architecture.Svg (image/png)
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