data representation

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Last updated 7:32 AM on 6/4/26
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13 Terms

1
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overflow error

the number of bits you need exceed the number of bits you have

2
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character set

all the different characters that a computer can represent

3
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how many characters does ASCII encode?

128 characters

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what’s one difference between ASCII and Unicode?

ASCII only has English characters, however Unicode has characters from foreign languages.

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pixel

a tiny square or dot that contains a single point of colour on an image

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colour density

the number of bits per pixel; determines number of colours are available

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resolution

the density of pixels in an image. resolution is calculated by the width X height X of pixels in an image

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metadata

data about the data for example, location, file size, and people inside the photo

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how many bits are in a nibble?

4 bits

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how many bits are in a byte?

8 bits

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how many nibbles are in a byte?

2 nibbles

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how many bytes are in a kilobyte?

1024

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what is the order of the units above byte?

kilobyte → megabyte → gigabyte → terabyte