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WorksheetsRepresentation
Total questions: 25
Worksheet time: 48mins
A byte consists of what numbers?
128 64 32 16 8 4 2 1
128 64 16 8 4 2 1
120 60 30 15 8 4 2 1
138 65 33 17 8 4 2 1
What is the maximum amount a byte can represent?
200
256
255
128
Order the data sizes highest to lowest
Bit nibble MB GB KB
KB nibble bit MB GB
Bit nibble KB MB GB
MB KB GB nibble bit
Nibble bit KB MB TB
Convert from denary to hex the number 40
38
18
16
25
28
Convert from denary to hex the number 97
32
A4
51
FF
61
Convert from denary to hex the number 140
22
45
E6
E7
8C
Convert from binary to hex the number 11010100
D1
D4
C5
C6
43
Convert from binary to hex the number 00111100
44
2C
3C
4F
AA
Convert from binay to hex the number 01110011
12
AE
AA
34
73
Convert from denary to binary the number 50
00111001
11100000
00110010
00010111
10000111
Convert from denary to binary the number 100
11100010
10001001
00110101
01100100
01110001
Convert from denary to binary the number 150
10011101
10010110
00111010
00101010
11100010
Convert from binary to denary the number 00000111
8
12
23
7
24
Convert from binary to denary the number 10000001
114
119
124
128
129
Convert from binary to denary the number 00001111
15
12
32
21
22
Explain how a bitmap image is represented on a computer?
A bitmap image is an image used by cameras and phones. the picture can be enlarged and the quality is kept
A bitmap image is an image that contains many pixels. Each pixel has a binary number, which determines its colour.
A bitmap image is an image that doesn't contains many pixels Some pixels have a binary number.
Bitmap images are small files that can edited. Once enlarged they keep their quality and are known as vector graphics
What is a pixel?
A colour
The whole picture, which holds a binary number
A small square on the screen which holds a binary number
The size of the file
The sum of the resolution
What is the resolution of an image if it has 150 by 320 pixels?
1200
2400
16000
48000
24000
What happens if you try to enlarge a bitmap image?
Nothing will happen to the quality
The file size increase
The file size will decrease
The pixels will enlarge with the image and leads to a lower quality image
The binary numbers will get longer
Explain how sampling takes place?
More samples taken, greater the quality
Denary numbers are assigned then turned into binary
More samples taken the smaller the file size
The less samples taken the better for the artist
What is the difference between analogue and digital?
Digital is on analogue is off
Digital is more expensive
Analogue is old technology
Digital is quicker
Digital is on or off, analogue can be within a range
Which of the following are digital?
Bike light
Microphone
Radio
DVD
Sky box
Which of the following are analogue?
Cassette player
Iphone
Radio
Thermometer
Washing machine
The sample above is low quality. Explain why?
The colours are wrong
The X Y axis is incorrect
The sample taken is too far apart
The sample taken is too close together
The time values aren't small enough
How can we increase the quality of this sound sample?
Change the colours
Slow down the time values
Take more samples
Turn the volume up
Turn the volume down
