Computing hardware 0.0 / 5 ? ComputingGCSEOCR Created by: EleanorCreated on: 29-05-13 10:40 CPU The central processing unit of a computer, containing the control unit, ALU and cache memory 1 of 22 Control unit Uses electrical signals to control the flow of data 2 of 22 ALU Performs all arithmetical and logical operations 3 of 22 Fetch-execute cycle The process of fetching instructions from main memory, decoding them then executing them 4 of 22 Clock speed How many cycles the computer can do per second 5 of 22 Cache size How many MB of cache memory there is 6 of 22 Bus Transfers data and signals between components of the computer 7 of 22 Number of cores How many CPUs there are 8 of 22 Logic gates A circuit that produces an output based on the inputs 9 of 22 Boolean algebra A method for expressing a logic circuit mathematically 10 of 22 Boolean logic Used within programs to determine the outcome of a comparison 11 of 22 Truth table A method for recording all possible input/output combinations 12 of 22 RAM Main memory of a computer that stores data, applications and the OS 13 of 22 ROM A store for data in the computer that cannot be overwritten 14 of 22 Virtual memory A section of the hard disk that is used as if it were RAM to supplement the amount of main memory available 15 of 22 Cache memory High speed memory used by a computer 16 of 22 Flash memory Non-volatile, solid state storage device 17 of 22 Input device A hardware device used to input data into a computer system for processing 18 of 22 Output device A device that displays data that has been processed by the computer system 19 of 22 Secondary storage Additional storage facilities added to a computer to store data and programs when the computer is switched off 20 of 22 Magnetic hard disk Uses magnetised platters to store data and files 21 of 22 Optical disk Uses lasers to read/write data onto a reflective surface 22 of 22
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