# Test Revision For Topic 3

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What is the advantage of lossy compression?
You can decrease the file to a smaller size
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The number of bits per pixel in an image is the...
Colour Depth
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The most appropriate storage unit for a person's surname
Bytes
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In sound sampling, if you increase the sampling rate what happens to the file size?
It increases
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What is RLE
Run length encoding
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The most appropriate storage unit for a one-page text document (with no images) is...
Kilobytes
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All characters which are recognised / can be represented by the computer system are called...
Character Sets
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Numbers are sometimes represented as Hexadecimal instead of Binary because...
They are easier to remember
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The concentration of pixels in a picture is called its...
Resolution
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What is sample resolution?
The number of bits used to store each measure of the amplitude of a soundwave
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What is sample rate?
The frequency with which you record the amplitude of a soundwave
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Convert the denary (decimal) number 58 to binary
111010
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To increase the sound quality of a file, you must...
Increase the sample rate
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What is NOT included in a bitmap file?
Number of people in it
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Calculate the denary (decimal) value of the 8-bit binary number 1001 0111.
151
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The most appropriate storage unit for a ten-minute movie clip (low definition) is...
Megabytes
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Your computer has a hard disk of 2 Terrabytes. How much is this in Gigabytes?
2000
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Convert the hexadecimal number 6A to denary (decimal)
106
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What happens when you try to add 1111 1111 to 0000 0001 and only have 8 bits of memory?
Overflow
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Convert the binary number 0011 1101 to hexadecimal
3D
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What is the advantage of lossless compression?
You can get all the data back out again
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Between Unicode and ASCII, which has a larger character set? (One is 8-bit and one is 16-bit)
Unicode
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## Other cards in this set

### Card 2

#### Front

The number of bits per pixel in an image is the...

Colour Depth

### Card 3

#### Front

The most appropriate storage unit for a person's surname

### Card 4

#### Front

In sound sampling, if you increase the sampling rate what happens to the file size?

What is RLE

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