1.2.3 Units Flashcards

1
Q

Why does data need to be stored as binary? (1)

A

Computers can only understand binary (1)

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2
Q

How do you calculate the size of a sound file? (3)

A

Sample rate (1) x duration in seconds (1) x bit depth (1)

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3
Q

How do you calculate the size of an image file? (3)

A

Colour depth (1) x image height in pixels (1) x image width in pixels (1)

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4
Q

How do you calculate the size of a text file? (2)

A

Bits per character (1) x number of characters (1)

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5
Q

What are the units of file sizes, smallest to largest? (8)

A

Bit Nibble Byte Kilobyte Megabyte Gigabyte Terabyte Petabyte

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6
Q

How many bits in a byte? (1)

A

8

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7
Q

How many bits in a nibble? (1)

A

4

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8
Q

How do you convert from a unit of file size to a larger unit?

A

Divide by 1000 per step (unless it’s nibbles or bits to byte)

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9
Q

How do you convert from a unit of file size to a smaller unit?

A

Multiply by 1000 per step (unless it’s bytes to nibble / bit)

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