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| What is the purpose of a CPU? To process data. |
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| What happens in the CPU? The searching, sorting, calculating and decision making of the computer. |
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| What is the Fetch - Decode - Execute cycle? The steps needed for processing to take place. |
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| What happens at the first (FETCH) step of the Fetch-Execute Cycle? The CPU fetches data and instructions from main memory to store in its temporary memory areas (registers). |
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| What are the three main parts of the CPU? Control Unit |
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| Immediate Access Store (IAS) |
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| Arithmetic and Logic Unit (ALU) |
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| What does the Immediate Access Store (IAS) do? It holds the data and programs needed by the Control Unit at that instant. |
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| What is the Arithmetic Logic Unit (ALU?) The part of the CPU that processed data by minipulating it or acting upon it. |
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| What is the clock speed? The amount of data a CPU can process in a certain time. |
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| What is one cycle per second equal to? One Hertz. |
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| How many instructions are being carried out by a computer running at 1GHz? A thousand million per second. |
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| What is the typical clock speed of a modern desktop? Three thousand million cycles per second (3 GHz). |
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| What does the clock speed affect? The performance of the CPU |
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| What do 'dual core' and 'quad core' mean? The computer runs with two CPUs or four CPUs. |
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