# Binary to images conversions

## Quiz by GCSE Computer Science Teacher 2

GCSE (AQA)
Computer Science
English National Curriculum

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12 questions
• Q1
Why must images be stored in a binary format?
Because computers can only understand binary
Because it takes less memory
To make it easier for humans to understand them
30s
3.3.6.b
• Q2
In a 2-bit depth image, what is the binary representation for the colour black?
00
01
11
10
30s
3.3.6.b
• Q3
In a 2-bit depth image, what is the binary representation for the colour white?
11
01
00
10
30s
3.3.6.b
• Q4
What is the binary representation for the colour light grey?
10
00
01
11
30s
3.3.6.b
• Q5
What is the colour depth of an image?
The number of colours captured in the image
The number of bits used to indicate the different colours of a pixels available
The use of primary colours and their scales
The range of colours scales used
30s
3.3.6.b
• Q6
What is the colour depth of a black and white image?
8
1
4
2
30s
3.3.6.b
• Q7
How many colours can an image with a 2-bit depth colour have?
2
10
4
8
30s
3.3.6.b
• Q8
What binary number would be used to represent the white squares?
11
1
0
00
30s
3.3.6.b
• Q9
What is the image above going to be?
A circle
A square
A cross
A smiley face
30s
3.3.6.b
• Q10
What colour is the square in the middle?
White
Black
There isn't one
Grey
30s
3.3.6.b
• Q11
How many pixels are being used in this image?
25
20
15
30
30s
3.3.6.b
• Q12
How many white pixels are in this image?
7
20
5
19
30s
3.3.6.b

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