Data And Information Flashcards
What is data on a computer stored as
As numbers which consists of 0s and 1s
Computer memory is made up of electronic components which can either be on (1) or off (0)
Smallest unit of data storage
(0 or 1) is called a bit
A number made up of of eight bits (11111111) is called a byte
Mother board
Makes all computer components work together
Central hub where everything that makes up your computer communicate with each other
Central Processing Unit
CPU
Brain of computer
Everything that goes on inside your system goes through the CPU
Usually a cooling fan on top of it
Random Access Memory
RAM
hardware in the computer where the operating system, application programs and days in current use are kept so they can be quickly reached by the device’s processor
Main memory in computer
Allows computer to do multiple tasks at once
The more memory you have the faster your computer will work
Volatile- retains data
Read only memory
ROM
Computer memory chips containing permanent or semi-permanent data
Non volatile - even after you turn off your computer the contents of ROM will remain
Once data is written it cannot be removed
Powe supply
Converts the electrical power from the wall socket to a suitable type and voltage so that each component of a computer works properly
What happens when computer is switched on
When you press the power button, the computer supplies power for its components
After it is switched he’d on a computer’s CPU has no software in its main memory so some process mist load software into memory before it can executed
Arithmetic Logic Unit
Digital circuit
Performs arithmetic and logic operations
The CPU tells the ALU what operation to perform
USB
Universal serial Bus
Fast, transferring up to 480 Mbps
