WorksheetsOCR GCSE - Bitmap images
Total questions: 18
Worksheet time: 15mins
Name
Class
Date
1.
What is a pixel?
a)
A small dot of colour
b)
1 or 0
c)
Colours on a screen
d)
The number of bits used to represent the colour
2.
A bitmap image is made up of
a)
Pixels
b)
Colours
c)
Sounds
d)
Samples
3.
Increasing the colour depth means…
a)
A bigger range of colours can be used for each pixel
b)
More pixels are in the image.
c)
More colours are in the image.
d)
Darker colours
4.
How many colours can be used for each pixel if the colour depth is 4 bit?
a)
4 colours
b)
5 colours
c)
15 colours
d)
16 colours
5.
How many colours can be used for each pixel if the colour depth is 8 bit?
a)
8 colours
b)
9 colours
c)
255 colours
d)
256 colours
6.
Reducing the amount of colours in the image will
a)
Reduce the quality of the image.
b)
Reduce the amount of binary needed for each pixel.
c)
Make the file size larger
d)
Remove pixels from the image.
7.
Additional Information about the image file is stored as
a)
Metadata
b)
Properties
c)
File summary
d)
Pixels
8.
The number of pixels per inch in an image is known as the
a)
Dimensions
b)
Colour depth
c)
Resolution
d)
Megapixels
9.
Increasing the resolution of an image means that
a)
More pixels will be used to make up the image
b)
More colours will be used to make up the image
c)
The image size will be bigger
10.
The binary code for each pixel is used to determine
a)
Which colour will be displayed
b)
How big the image is
c)
What shape the image is
d)
How many pixels will be in the image
11.
Which is NOT an effect of increasing the resolution in an image?
a)
More colours can be displayed.
b)
More binary will be required to create the image.
c)
Larger file size
d)
Higher quality image
12.
Which is NOT an effect of increasing the colour depth in an image?
a)
More colours can be displayed.
b)
More binary will be needed per pixel to create the image.
c)
Larger file size
d)
More pixels will be displayed in the image.
13.
How could you reduce the file size of an image?
a)
Reduce the numbr of colours used per pixel (colour depth)
b)
Reduce the dimensions of the image.
c)
Compress the file using a lossy compression file type.
d)
All of these
14.
Define the term "Colour Depth"
a)
The number of bits used per pixel (BPP).
b)
The number of colours used in an image.
c)
The number of pixels per inch (PPI).
d)
The total number of pixels in an image.
15.
What is the formula to find the size of an image file?
a)
width * colour depth
b)
width * height * colour depth
c)
width * height * number of colours
d)
height * number of colours
16.
Calculate the file size in bits - height 5, width 5, colour depth 2
a)
50
b)
500
c)
12
d)
20
17.
Calculate the file size in bits - height 2, width 2, colour depth 4
a)
80
b)
8
c)
16
d)
18
18.
Calculate the file size in bits - height 3, width 2, number of colours 8
a)
13
b)
8
c)
48
d)
18
100 %
