Computing

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Why is data represented in binary form?
Modern computers work in binary as it is easy to represent two states in a simple electronic circuit. Binary is a number system with just two symbols, 0 and 1. 1 represents on, 0 represents off.
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Why do we use hex in computer systems?
Large binary numbers are hard to remember and programmers want something that is easily convert from binary but also easy to recognise.
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Bit
each individual ‘1’ or ‘0’ is a bit-short for binary digit
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Byte
8 bits are a byte
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Kilobyte
1024 bytes
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Megabyte (Mb)
1024 Kilobytes
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Gigabyte (Gb)
1024 Megabytes
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Terabyte (Tb)
1024 Gigabytes
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How is ASCII or Unicode represented in a computer?
Each character is assigned a unique character code. Each letter is converted to its character code (which is a binary number)
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What's the resolution of an image?
The resolution is the number of pixels per unit, for example the number of pixels per inch
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Other cards in this set

Card 2

Front

Why do we use hex in computer systems?

Back

Large binary numbers are hard to remember and programmers want something that is easily convert from binary but also easy to recognise.

Card 3

Front

Bit

Back

Preview of the front of card 3

Card 4

Front

Byte

Back

Preview of the front of card 4

Card 5

Front

Kilobyte

Back

Preview of the front of card 5
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