Data representation

4 bits=

nibble

8 bits=

1 byte

1000 bytes=

kilobyte

1 million bytes=

megabyte

1 billion bytes=

gigabyte

trillion bytes=

terabyte

quandrillian bytes=

petabyte

why are electronic compounds better with two states (binary)

cheap ,easy to manufacture, reliable

examples of using two sates (binary) to store data

ram ,hard disk, ,flash memory ,optical disk

calculating text file sizes

bits per characters *number of characters

calculating image file size

colour height*image height px* image width px

calculating sound file size

sample rate* duration in seconds* bit depths

define character sets

defines list of characters recognized by computer

each character represented by

unique binary number

what is ascii

7 bit character set with 2⁷ characters

what is extended ascii

8 bit character set with 2⁸ characters

define unicode

24 bit character set with 2²⁴ characters