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Computer Science
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- 1Input DeviceDevices used by the user to input data
- 2Examples of Input DevicesKeyboard
Mouse
Microphone
Touchscreen - 3Output DeviceDevice connected to the computer which outputs data
- 4Examples of Output DevicesMonitor
Speaker
Touchscreen
Vibration (Controller) - 5CPUCentral Processing Unit
Executes instruction defined by software and process data - 6VolatileData is lost once power is lost
- 7Primary StorageHold active programs, their instructions and in use data. Used by the CPU because it is quick and stores data from secondary storage. It is usually volatile memory
e.g. RAM - 8Secondary StorageStores documents, data and programs. These are non-volatile forms of storage.
- 9Describe the fetch-decode-execute cycle1. Data / instructions are retrieved from the primary storage based
2. Converted to micro-instructions understandable by the CPU
3. Data is processed / instructions are performed by the CPU
4. Repeat with next data / instruction - 10List factors which affect the CPU speedClock Speed
Number of Cores
Amount of Cache - 11ROMRead-Only Memory is non-volatile memory used to provide the initial instructions at the start up of the computer
- 12Advantages of Magnetic StorageCheap
Large storage - 13Disadvantages of Magnetic StorageHas moving parts - not portable
Noisy
Slow
Generates heat - 14Optic StorageDiscs and CDs used to store data. Works by engraving troughs into the medium to affect the reflecting of light to determine its value
Portable but small space - 15Advantages of Solid State Drives
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- Fichas sobre Computer Science, creado por Finlay Boyle el 18/05/2017.
- Creado por
- Finlay Boyle
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