WorksheetsData Representation: Sound, Text & Images
Total questions: 15
Worksheet time: 10mins
Name
Class
Date
1.
The number of samples taken at each fixed interval
a)
Bit Rate
b)
Sample rate
2.
How many combinations of binary numbers can you make with a Bit Rate of 4?
a)
2
b)
16
c)
65000
3.
Images can contain a geographical location of where the picture was taken. This is stored in a special area of an image file called:
a)
Metadata
b)
File name.
c)
Compression area.
d)
Alpha-channel.
4.
Convert the binary number 1110 to decimal.
a)
3
b)
10
c)
15
d)
14
5.
Convert 64 to binary
a)
10000000
b)
01111110
c)
01000000
d)
11001100
6.
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
7.
The following is a correct order of units of storage from lowest to highest:
a)
a bit, a nibble, a byte, a kilobyte, a megabyte, a gigabyte, a terabyte
b)
a bit, a byte, a nibble, a kilobyte, a megabyte, a gigabyte, a terabyte
c)
a bit, a nibble, a byte, a megabyte, a kilobyte, a gigabyte, a terabyte
d)
a byte, a bit, a nibble, a megabyte, a kilobyte, a gigabyte, a terabyte
8.
Unicode can represent:
a)
65,536 different characters
b)
255 characters
c)
127 characters
9.
Bitmap Colour Depth is
a)
the colour of each pixel.
b)
the density of pixels in an image.
c)
information stored in an image to help recreate the image.
d)
the number of bits used for each pixel.
10.
How many bits was used to encode the original ASCII character set?
a)
7
b)
8
c)
16
d)
4
11.
What is a pixel?
a)
Picture element - the small dots that make up an image.
b)
How an image is stored on the computer.
c)
A type of image
d)
A special type of photograph
12.
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
13.
The resolution of an image refers to the quality of the image.
a)
TRUE
b)
FALSE
14.
A byte is
a)
8 bits
b)
4 bits
15.
What is a pixel?
a)
Picture element - the small dots that make up an image.
b)
How an image is stored on the computer.
c)
A type of image
d)
A special type of photograph
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