Unit 2-Computer Scince

Unit 2-Computer Scince

1. Cpu

   • The purpose of the CPU / is to compleat your instrution by complating a cycle of Fetching,Decoding and Exacuting
   • Fetch Execute Cycle/ Feaching, decoding ans exacuting
   • Clock Speed/Rate the CPU works at,i.e one cycle per second = 1hertz
   • Cache Memory/ is what will take pressure of the CPU by finding the most used thing befor the command has evan came though

2. Memory

   • RAM/ Random Access Memory ROM/ Read Only Memory
   • Ram will speed up the cycle of the system
   • The purpose of ROM in a computer is for things like saving settings and personal files
   • RAM for fast tempeory storage
   • ROM/ Is for saving things like settings and personal data
   • Since RAM is for fast tempeory storage the more Ram the more open space to save thing meaning a faster system

3. Input and Output DEVICES

   • Input: something that sends data into the computer
     • Inputs: keybord , mouse, buttons,usb sticks,wires
   • Outputs: someting that than sends data from a computer
     • Outputs: monter, light indercators ,wires ,speackers

4. Binary

   • Binary is a numerical code made of 1's and 0's
     • 1 stands for on 0 stands for off
   • binary has denary numbers that are 1,2,4,8,16,32,64 and 128
     • Hexadecimal numbers are 0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F

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