Edexcel curriculum (2015)
AlgorithmsAsciiBinaryClient-ServerCloudCompressionComputational thinkCPUCyber securityDatabaseFetch-d-e cycleEmbedded systemEncryptionEnvironmentEthicsFile sizeFlow chartHexadecimalHigh Level languageISP/InternetLaw & LegislationLogicMagnetic HDDNetworkingOpen sourceOperating systemOptical storagePeer to peerPictures (data rep)ProtocolsRun length encodingRAMROMSimulation softwareSolid state HDSoundStored programUtility Software |
CPU
Answer
Indicative content: Specification 2 has a higher clock speed and therefore will be able to deal with a greater number of instructions / cycles per second with the effect that processing will be faster than for Specification1. Because of the higher clock speed the CPU in Specification 2 will use more energy and create more heat than the CPU in Specification 1. The CPU cache memories and the bandwidths are the same. Specification 1 has more RAM / a larger memory and will therefore be able to handle more programs and operations at the same time. The larger memory will reduce the extent of swapping with virtual memory / secondary storage which will go some way to offset the benefit provided by the greater clock speed of Specification 2.? CPU
Answer
B - Register 
Answer
One mark for name and one mark for use (must match) Control Unit (CU) o Sends signals to other components to coordinate the cycle Arithmetic / Logic Unit (ALU) o Performs arithmetic (+,-,/,*, etc.) and logic (AND,NOT, OR, etc.) Registers o Very fast storage locations which hold instructions, data, or memory addresses. Cache (Not expected) o Sits between components in the microprocessor to make up for the difference in physical speed of the components Address Bus o Holds the address of physical memory or the address of an input/output device that is to be read from/written to Data Bus o If an instruction needs data, the data is loaded onto the data bus before being read by the CPU o All data/instructions moved here to go to or from Memory Clock o Provides the timing for the cycle |