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Year 11 Data Represention Revision IGCSE

Total questions: 119

Worksheet time: 2hrs 42mins

Name
Class
Date
1.
Which of these is the smallest?
a)
21 Nibbles
b)
40 bits
c)
8 bytes
d)
1 Kilobyte
2.
Which of these is the largest?
a)
9 Megabytes
b)
100 Kilobytes
c)
0.01 Gigabyte
d)
40000 Bytes
3.
Which of these would hold 1 hexadecimal value?
a)
Bit
b)
Nibble
c)
Byte
d)
Petabyte
4.
How many bits would you need to store this number: 1010101
a)
7
b)
14
c)
1
d)
2
5.
How many unique values can you represent with 6 bits
a)
32
b)
16
c)
64
d)
128
6.
What is 100101 in denary?
a)
37
b)
74
c)
44
d)
20
7.
What is 10001001 in denary?
a)
137
b)
274
c)
192
d)
44
8.
What is 5B in denary?
a)
91
b)
90
c)
181
d)
182
9.
What is E in denary?
a)
11
b)
13
c)
14
d)
16
10.
What is 18 in binary?
a)
10010
b)
1001
c)
10101
d)
11001
11.
What is 130 in hexadecimal?
a)
82
b)
94
c)
66
d)
76
12.
What is 10010101 in hexadecimal?
a)
95
b)
75
c)
44
d)
A2
13.
Which of these is base 10?
a)
Denary
b)
Hexadecimal
c)
Binary
d)
ASCII
14.
Convert 128 to binary
a)
10000000
b)
01111110
c)
10000001
d)
11001100
15.
Convert 65 to binary
a)
01100001
b)
00100001
c)
01000001
d)
00100101
16.
Convert 254 to binary
a)
11110000
b)
11111100
c)
11111111
d)
11111110
17.
Convert 37 to binary
a)
00100101
b)
00100011
c)
00100111
d)
01000101
18.
Convert 196 to binary
a)
11000110
b)
11100100
c)
11000100
d)
11010100
19.
Convert 00010001 to decimal
a)
17
b)
27
c)
37
d)
47
20.
Convert 11111111 to decimal
a)
255
b)
245
c)
235
d)
225
21.
Convert 00100100 to decimal
a)
26
b)
36
c)
46
d)
56
22.
Convert 01000100 to decimal
a)
58
b)
68
c)
78
d)
88
23.
What are the only two numbers you can use in binary?
a)
0 and 1
b)
1 and 2
c)
1, 2, 3, 4, 5, 6, 7, 8, 9, 10
d)
1, 2, 4, 8, 16
24.
If a binary number ends with a 1, it must be...
a)
An odd number
b)
An even number
c)
A prime number
d)
The number 12
25.
Which of these is the correct sequence for the place values for binary numbers?
a)
1, 2, 4, 8, 16, 32, 64, 128
b)
1, 2, 4, 6, 8, 10, 12, 14, 16
c)
1, 2, 3, 4, 5, 6, 7, 8
d)
0, 1
26.
What is the denary number system?
a)
It counts the number of dens
b)
Our usual base 10 number system
c)
A special number system for computers
d)
Den Ary's number system
27.
What is the point of binary?
a)
It represents how computers interpret electrical signals
b)
Because we like to make you do extra maths ;-D
c)
For the lulz
d)
Because it describes star systems
28.
What is 1011 in denary?
a)
11
b)
14
c)
26
d)
1011
29.
What is 0101 + 1010?
HINT:
1 + 0 = 1
0 + 1 = 1
1 + 1 = 10
a)
1111
b)
2020
c)
146.6
d)
?
30.
Calculate the binary addition:
01
11
Use binary addition rules + whiteboards!
a)
101
b)
11
c)
111
d)
100
31.
Calculate the binary addition:
1001
1011
Use binary addition rules + whiteboards!
a)
10100
b)
010101
c)
011100
d)
01010011
32.
Calculate the binary addition:
1111
1011
Use binary addition rules + whiteboards!
a)
110101
b)
11110
c)
11011
d)
11010
33.
Calculate the binary addition:
01111
11011
Use binary addition rules + whiteboards!
a)
1010100
b)
101110
c)
111010
d)
101010
34.
Calculate the binary addition:
01111
11011
Use binary addition rules + whiteboards!
a)
101010
b)
11101001
c)
11001011
d)
1010101111
35.
What is the answer to 010 + 010?
a)
110
b)
010
c)
100
d)
011
36.
What is the answer to 1010 + 0101?
a)
1011
b)
1001
c)
1111
d)
0111
37.
What are the different types of data a computer stores?
a)
Images and Videos
b)
Games and Animations
c)
Words and Numbers
d)
All of these are data
38.
Binary uses electrical signals
a)
True
b)
False
39.
Each 1 and 0 represented in binary is called a bit
a)
True
b)
False
40.
There are 8 bits to one byte
a)
True
b)
False
41.
A bitmap image is made up of
a)
Pixels
b)
Colours
c)
Sounds
d)
Samples
e)
Characters
42.
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
43.
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
44.
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
45.
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.
46.
Which is NOT an example of metadata for an image file?
a)
Resolution
b)
Colour depth
c)
Camera used
d)
Sample rate
47.
Additional Information about the image file is stored as
a)
Metadata
b)
Properties
c)
File summary
d)
Pixels
48.
The number of pixels per inch in an image is known as the
a)
Dimensions
b)
Colour depth
c)
Resolution
d)
Megapixels
49.
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
50.
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
51.
How many pixels are in a megapixel?
a)
1
b)
100
c)
1000
d)
1000000
52.
What megapixel camera was used for an image with the dimensions of 4000 x 3000 pixels?
a)
7 megapixels
b)
7 million megapixels
c)
12 megapixels
d)
12 million megapixels
53.
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
54.
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.
55.
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
56.
What would be the colour depth of an image which can use up to 256 colours?
a)
256 bit
b)
8 bit
c)
8 byte
d)
256 byte
57.
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.
58.
Define the term "Resolution"
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.
59.

What type of compression allows you to reconstruct the original data?

a)

Lossless compression

b)

Lossy compression

60.

What type of compression does not allow you to reconstruct the original data?

a)

Lossless compression

b)

Lossy compression

61.

Based on your experience with text compression, which of the following sentences would compress the BEST?

a)

The quick brown fox jumped over the lazy dog.

b)

Buffalo buffalo Buffalo buffalo buffalo buffalo Buffalo buffalo.

c)

How much wood would a woodchuck chuck if a woodchuck could chuck wood?

d)

JavaScript scripts are actually different scripts than Java scripts.

62.

True or False? Compression reduces the size of a file to make it smaller

a)

True

b)

False

63.

MP3 is a lossless file format for sound. True or False?

a)

TRUE

b)

FALSE

64.
What is compression?
a)
To convert one file to another
b)
To reduce the size of data to save space
c)
To minimize the time taken for a file to be downloaded
d)
To compress something by pressing it very hard
65.
A byte is
a)
8 bits
b)
4 bits
66.

A kilobyte is

a)

1024 bits

b)

1024 bytes

67.
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
68.

Which is larger?

a)

Megabyte

b)

Gigabyte

69.
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
70.
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
71.
Computers use binary because they have circuits which are either on or off, which gives them two states to work from to make calculations and run processes - True or False?
a)
True
b)
False
72.
What is the largest number you can represent with 8 bits?
a)
64
b)
128
c)
200
d)
255
73.

Select the Twos Compliment for -5

a)

11111011

b)

11111010

c)

0000 0101

d)

01111011

74.

Select the Twos Compliment for -77

a)

00110011

b)

10110011

c)

10110010

d)

01111011

75.

Use Twos Compliment work out 65 + -43.


Remember in exam you must show your working....

a)

1 (ignored carry bit) 0001 0110

b)

0 (ignored carry bit) 0001 0110

c)

0001 0110

d)

1 (ignored carry bit) 0001 1001

76.
Convert 11111111 to decimal
a)
255
b)
245
c)
235
d)
225
77.
Computers can only understand 0s and 1s.
a)
True
b)
False
78.
A group of 8 bits is known as a gigabyte.
a)
True
b)
False
79.
8 bytes = 1 bit
a)
TRUE
b)
FALSE
80.
If a binary number ends with a 1, it must be...
a)
An odd number
b)
An even number
c)
A prime number
d)
The number 12
81.
A bit is 
a)
a numerical label assigned to each device.
b)
the smallest unit of data in a computer.
c)
a keyboarding term for typing.
d)
is a numeral system made up of 16 symbols.
82.
What is 19 in hexadecimal
a)
13
b)
10011
c)
19
d)
1A
83.
What is the maximum number of values that can be represented in 7 bits? (4-6)
a)
16
b)
256
c)
65,536
d)
128
84.

1 1 0 1 1 - 1 0 1 1

a)

11000

b)

01010

c)

11111

d)

1 0 0 0 0

85.

1 0 1 1 0 - 1 1 0 1

a)

0 1 1 0 1

b)

1 0 0 0 1

c)

0 1 0 0 1

d)

1 1 0 0 1

86.

True or False? Compression reduces the size of a file to make it smaller

a)

True

b)

False

87.

Lossy or lossless? This type of compression does not get rid of any data

a)

Lossy

b)

Lossless

c)

Both

88.

Lossy or lossless? This type of compression gets rid of some information

a)

Lossy

b)

Lossless

c)

Both

89.

Lossy or lossless? All information and quality is kept

a)

Lossy

b)

Lossless

c)

Both

90.

Lossy or lossless? Some quality is lost

a)

Lossy

b)

Lossless

c)

Both

91.
What is compression?
a)
To convert one file to another
b)
To reduce the size of data to save space
c)
To minimize the time taken for a file to be downloaded
d)
To compress something by pressing it very hard
92.

What is the smallest representable part of an image?

a)

Pixel

b)

Bit depth

c)

Sample

d)

Resolution

93.

How is the resolution of an image calculated?

a)

Width in pixels * height in pixels

b)

Colour depth * number of pixels

c)

Number of pixels squared

d)

Sample rate * sample resolution * length in seconds

94.

Colour depth defines...

a)

How many bits are needed to store each pixel

b)

How many pixels are in an image

c)

The file size of a bitmap image

d)

The sample rate of sound

95.

A bitmap image of 20 by 20 pixels using a colour dept of 8 bits would have a file size of around:

a)

400 bytes

b)

3200 bytes

c)

40 bytes

d)

320 bytes

96.

Sound outside of computers is...

a)

Analogue

b)

Digital

97.

In order for sound to be stored in a computer it must be converted to...

a)

Analogue

b)

Digital

c)

Buddhism

d)

JPEG

98.

When recording sound, the number of samples recorded per second is called the:

a)

sample rate

b)

sample resolution

c)

colour depth

d)

File size

99.

Increasing the sample rate of a recording will result in...

a)

Higher-quality sound recording

b)

Increased file size

c)

Better compression

d)

Higher colour depth

e)

Increased amplitude

100.

Which file type is used for Sound

a)

.MP3

b)

.PNG

c)

.PSD

d)

.DOCX

101.

Height, width and colour are properties of an image known as?

a)

Metadata

b)

Dataset

c)

Record

d)

File

102.

How many colours can a bitmap using 2-bit colour depth contain?

a)

2

b)

4

c)

8

d)

16

103.

3.5MB is how many kB?

a)

350

b)

3500

c)

3500000

d)

35000

104.

What is the smallest representable part of an image?

a)

Pixel

b)

Bit depth

c)

Sample

d)

Resolution

105.

What are bitmaps made up of?

a)

Pixels

b)

Bit depth

c)

Samples

d)

Resolution

106.

How is the resolution of an image calculated?

a)

Width in pixels * height in pixels

b)

Colour depth * number of pixels

c)

Number of pixels squared

d)

Sample rate * sample resolution * length in seconds

107.

How many colours can a bitmap using 2-bit colour depth contain?

a)

2

b)

4

c)

8

d)

16

108.

How many colours can a bitmap using 4-bit colour depth contain?

a)

2

b)

4

c)

8

d)

16

109.

Colour depth defines...

a)

How many bits are needed to store each pixel

b)

How many pixels are in an image

c)

The file size of a bitmap image

d)

The sample rate of sound

110.

How is the file size of an image calculated?

a)

Width in pixels * height in pixels

b)

Number of pixels in image * colour depth

c)

Number of pixels squared

d)

Sample rate * sample resolution * length in seconds

111.

A bitmap image of 10 by 10 pixels using a colour dept of 8 bits would have a file size of around:

a)

100 bytes

b)

800 bytes

c)

400 bytes

d)

80 bytes

112.

Sound outside of computers is...

a)

Analogue

b)

Digital

113.

In order for sound to be stored in a computer it must be converted to...

a)

Analogue

b)

Digital

c)

Buddhism

d)

JPEG

114.

Sound waves must be samples to create digital sound. A sample is...

a)

a measure of amplitude at a point in time

b)

the number of samples taken per second

c)

the file size of an image

115.

When recording sound, the number of samples recorded per second is called the:

a)

sample rate

b)

sample resolution

c)

colour depth

d)

File size

116.

To calculate the size of a sound file:

a)

colour depth * resolution

b)

sample rate * sample resolution * length in seconds

c)

number of samples * sample rate

d)

sample resolution squared

117.

A 10-second sound recorded at 1000 Hz and 8-bit sample resolution will have a file size of...

a)

10 KB

b)

10 B

c)

10,000 KB

d)

10,000 B

118.

Increasing the sample rate of a recording will result in...

a)

Higher-quality sound recording

b)

Increased file size

c)

Better compression

d)

Higher colour depth

e)

Increased amplitude

119.

An image with only 3 colours could be stored using what minimum colour depth?

a)

2 bit

b)

3 bit

c)

4 bit

d)

1 bit

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