Units of Data Storage (OCR GCSE Computer Science): Quizzes

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Units of Data Storage
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What is binary?

A number system using 0 and 1

Why do computers only process data in binary?

They only understand machine code (0s & 1s)

What is a bit?

The smallest unit of data (0 or 1)

How many bits are in a nibble?

4 bits

How many bits are in a byte?

8 bits

How many bytes are in 1 kilobyte (KB)?

1,024 bytes

How many kilobytes (KB) are in 1 megabyte (MB)?

1,024 KB

How many megabytes (MB) are in 1 gigabyte (GB)?

1,024 MB

Which types of data are translated into binary for storage?

Text, images, sound & instructions

What is the formula for sound file size?

Sample rate ×\times duration ×\times bit depth

What is the formula for image file size?

Colour depth ×\times height ×\times width

What is the formula for text file size?

Bits per character ×\times characters

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