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9442642
Binary
Descripción
revision 1
Sin etiquetas
computer studies
gcse
Mapa Mental por
Naimah Bowen
, actualizado hace más de 1 año
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Creado por
Naimah Bowen
hace alrededor de 7 años
312
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Resumen del Recurso
Binary
How is Data represented?
1 and 0s
hold a value of a power of two
these go up to 255
anything over this value is an overflow erroe
on and off
a computer is made up of digital transistors
They can only be 1 (on) or 0 (off)
Binary
base 2 number system
Why do computers need binary?
represented in bytes
can store data
can communicate with other devices and software
basic state of a computer system.
Needed for 2 reasons
Two clear states, that are reliable and available for computers to work with
Decreases the need for space, electronic energy and cost.
Computer transfers electronic components
binary to denary
denary is a bade 10 number system
how to go from binary to denary
put a column of base 2 numbers
128, 64, 32, 16, 8, 4, 2, 1
you find the highest number that goes into A
if the value is 84 then the largest number is 64
put a one into the 64 column
then you work out the next value
84 - 64 = 20
then 20 goes into 16
then you do 20 - 16= 4
so you but a 1 in the 4 section
then your binary value is 01010100
left shift and right shift
Multiplication is known as a left shift Division is known as a right shift
If you shift right by one place, it divides the number by 2
shifting one place to the right multiplies by 2
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