Computer Science

Computer Science

1. Topic 3

   • Hardware
     • CPU
       • Clock
         • Sends electronic signals to synchronise their actions
         • Fetch, decode, execute
         • Faster the clock, the more instructions the CPU can execute per second
       • CU
         • Decodes instructions received from main memory
         • Coordinates actions of the other parts of the CPU to execute them
       • ALU
         • Performs arithmetic and logic operations on data
       • Registers
         • Provide fast, temporary storage for instructions, intermediate results and data.
       • Cache
         • a type of high-speed random access memory (RAM) which is built into the processor
       • Buses
         • Data Bus
           • transfer data to and from the memory of a computer, or into or out of the central processing unit
         • Address Bus
           • carries memory addresses from the processor to other components
         • Control Bus
           • carries control signals from the processor to other components
   • Software
   • Programming

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