unit 2 -computer science

unit 2 -computer science

1. CPU

   • The central processing unit of a computer is the hardware that executes instructions from programs
   • Cache size is a smaller, faster memory. Which stores data from frequently used main memory locations.
   • It fetches instructions from main memory. then it decodes the instruction, and the executes the instruction at a high speed.

2. Memory

   • Rom: stores inputs and outputs information and does normal configuration.
   • Ram: temporary memory. It copy's the operating system.

3. Inputs and Outputs

   • An input device is something that can extract information or it can receive information : Mouse, keyboard.
   • An output device is something that can display information or give out information : speakers, Monitor.

4. Binary

   • Denary numbers include 1 2 4 8 16 32 64 and 128.They always double each other.
   • Binary is computer language, and how the computer decodes instructions. It uses 1 and 0 to decode.