GCSE Computer Science 0.0 / 5 ? ComputingDatabasesGCSEOCR Created by: GauntCJ01Created on: 21-11-17 05:20 What is a CPU? Central Processing Unit 1 of 15 The CPU has two main components: the ______ and the ______ Control Unit & Arithmatic Logic Unit(ALU) 2 of 15 What Is an 'Embeded' device? A computer that forms part of a larger device. 3 of 15 What are the Four main components of a computer? Main Memory, Input Devices, Output Devices, Secondary Storage. 4 of 15 Define Main Memory: RAM or ROM. 5 of 15 Define an Input Device: Somthing that inputs data into a system e.g. a keyboard. 6 of 15 Define an Output Device: Somthing that outputs data from the computer e.g a monitor. 7 of 15 Define Secondary Storage: Somthing that holds files e.g. a USB or Hard drive. 8 of 15 In the FDE cycle, what abbreviation does each letter hold? F = Fetch, D=Decode, E=Execute 9 of 15 Define the roll of 'Fetch': 'F' takes memory and data from the main memory and ensures that the next instruction is carried out. 10 of 15 Define the roll of 'Decode': 'D' breaks down the instruction. 11 of 15 Define the roll of 'Execute': 'E' carries out the instruction. 12 of 15 What is the roll of the Arithmatic Logic Unit(ALU)? The ALU is where calculations are performed inside the CPU. 13 of 15 There are Four types of Registers. What are they? Program Counter, Memory Address Register, Memory Data Register, Accumulator. 14 of 15 Define the Memory Address Register(MAR): Holds the memory of the current instruction an 15 of 15
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