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IGCSE Data Representation

Total questions: 137

Worksheet time: 2hrs 39mins

Name
Class
Date
1.
Convert 128 to binary
a)
10000000
b)
01111110
c)
10000001
d)
11001100
2.
A byte is
a)
8 bits
b)
4 bits
3.

Convert 64 to binary

a)

10000000

b)

01111110

c)

01000000

d)

11001100

4.

Convert 3 to binary

a)

10000001

b)

01111110

c)

00000011

d)

11001100

5.
A bitmap image is made up of
a)
Pixels
b)
Colours
c)
Sounds
d)
Samples
e)
Characters
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.
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
8.
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
9.
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
10.
What is the largest number you can represent with 8 bits?
a)
64
b)
128
c)
200
d)
255
11.

Denary is a base ____ number system

a)

2

b)

10

c)

16

d)

50

12.

Binary is a base ______ number system

a)

2

b)

10

c)

16

d)

45

13.
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
14.
Choose the best answer about character sets:
a)
All characters in character sets are stored in binary.
b)
Some characters in character sets are stored in binary.
c)
Only binary characters in character sets are stored in binary.
15.
The following is true about character sets:
a)
Each letter has a unique code
b)
Lower and upper case letters share the same codes
c)
ASCII is one of the latest character sets to be adopted
16.
What is the answer to 010 + 010?
a)
110
b)
010
c)
100
d)
011
17.
What is the answer to 0110 + 0101?
a)
1011
b)
1101
c)
1110
d)
1111
18.
What is this an example of?
a)
Overflow error
b)
8 bit binary addition
19.
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
20.
A bitmap image is made up of
a)
Pixels
b)
Colours
c)
Sounds
d)
Samples
e)
Characters
21.
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
22.
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
23.
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
24.
Most graphic formats create many colours from:
a)
Red, green, blue.
b)
Red, pink, yellow.
c)
Red, white, blue.
d)
Black, white, green.
25.

In a bitmap graphic each pixel is represented in _______

a)

Denary

b)

Binary

c)

Hexadecimal

d)

By letters

26.

How many bits per pixel do you need to make 4 colours?

a)

colour depth of 1

b)

colour depth of 2

c)

colour depth of 3

d)

colour depth of 4

27.

What is the colour depth of the image?

a)

colour depth of 1

b)

colour depth of 2

c)

colour depth of 4

d)

colour depth of 16

28.

A Byte consists of this many bits

a)

2

b)

4

c)

8

d)

16

29.

A 1-bit image has this many colours

a)

2

b)

4

c)

8

d)

16

30.

Which is larger?

a)

Bit

b)

Byte

31.

Which unit of data is biggest?

a)

Megabyte

b)

Gigabyte

c)

Kilobyte

d)

Terabyte

32.

ASCII is used to

a)

Represent an image

b)

Give a binary code to a pixel

c)

Give a binary code to a character

d)

Calculate the size of a text file

33.

A USB Flash drive would most likely be measured in which unit of data?

a)

Megabytes

b)

Kilobytes

c)

Gigabytes

d)

Petabytes

34.

What digits are part of the binary number system?

a)

0-9

b)

0-F

c)

0 and 1

d)

1-9

35.

In a number system like binary, what is the value of each digit called?

a)

Place value

b)

Base

c)

Bargain value

d)

ASDA value

36.

What number do you carry when adding two binary numbers?

a)

0

b)

1

c)

You never carry a number as numbers are heavy

37.

Convert the binary number 1001 to decimal.

a)

4

b)

5

c)

9

d)

11

38.

Convert the binary number 1110 to decimal.

a)

3

b)

10

c)

15

d)

14

39.

Convert the binary number 1010 to decimal.

a)

8

b)

10

c)

9

d)

7

40.

Convert the decimal number 4 to binary.

a)

1000

b)

0101

c)

0010

d)

0100

41.

Convert the decimal number 14 to binary.

a)

1110

b)

1100

c)

1011

d)

0101

42.

Add the binary numbers 0011 and 0001

a)

0100

b)

1001

c)

0110

d)

0010

43.

Add the binary numbers 0110 and 1010

a)

1101

b)

11001

c)

11000

d)

10000

44.

Add the binary numbers 01101101 and 11011011

a)

0101001000

b)

1010110111

c)

1101010101

d)

0110100101

45.

What can a bit hold?

a)

1 and 0

b)

1 or 0

46.

How many bits are in a byte?

a)

4

b)

2

c)

8

d)

10

47.

How many bits are in a nibble?

a)

8

b)

4

c)

2

d)

10

48.
A character set is...
a)
What language can be used in a computer system.
b)
The fonts that a computer has installed.
c)
The possible characters that can be represented by a computer system.
49.

How is Unicode different from ASCII

a)

Unicode represents fewer characters

b)

Unicode represents more characters

c)

Unicode isn't for letters

d)

Unicode doesn't have numbers

50.

Upper and lower case letters have a different ASCII code.

a)
True
b)
False
51.

What is the maximum number of values that can be represented in 7 bits?

a)
16
b)
256
c)
65,536
d)
128
52.
In computing, a bit is
a)
8 bytes
b)
a single    0 or 1     on or off
53.
ASCII was developed in what decade?
a)
1950s
b)
1960s
c)
1970s
d)
1940s
54.
True or False: The binary number for a capital 'A' is the same as the binary number for a lower-case 'a'?
a)
True
b)
False
55.

In a bitmap graphic each pixel is represented in _______

a)

Denary

b)

Binary

c)

Hexadecimal

d)

By letters

56.

A binary code represents

a)

the colour of each pixel.

b)

the density of pixels in an image.

c)

the information stored in an image to help recreate the image.

d)

the number of bits used for each pixel.

57.

How many bits per pixel do you need to make 4 colours?

a)

colour depth of 1

b)

colour depth of 2

c)

colour depth of 3

d)

colour depth of 4

58.

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.

59.

What is the colour depth of the image?

a)

colour depth of 1

b)

colour depth of 2

c)

colour depth of 4

d)

colour depth of 16

60.

Resolution 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.

61.

More resolution means

a)

less image quality

b)

less pixels per inch

c)

more bits per pixel

d)

more pixels per inch

62.

Increasing Colour Depth and Resolution

a)

increases the File size

b)

decreases the File size

c)

increases memory

d)

decreases sound

63.

Metadata is

a)

the colour of each pixel.

b)

the density of pixels in an image.

c)

the information stored in an image to help recreate the image.

d)

the number of bits used for each pixel.

64.

Image metadata holds information about the image such as

a)

name, colour, brand

b)

file format, resolution, colour depth, date

c)

brand, colour, size

d)

content, colour, name

65.
A bitmap image is made up of
a)
Pixels
b)
Colours
c)
Sounds
d)
Samples
e)
Characters
66.
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
67.
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
68.
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
69.
Additional Information about the image file is stored as
a)
Metadata
b)
Properties
c)
File summary
d)
Pixels
70.
The number of pixels per inch in an image is known as the
a)
Dimensions
b)
Colour depth
c)
Resolution
d)
Megapixels
71.
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
72.
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
73.
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.
74.
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.
75.
Which of the following file types will use lossy compression to reduce the size of the image file?
a)
JPEG (JPG)
b)
BMP (Bitmap)
c)
MP3
d)
MPEG
76.

What would be the size of an image file that is 10x10 pixels in size and has a 2 bit colour depth?

a)

100 bits

b)

200 bits

c)

2MB

d)

20 bits

77.

A character code that enables most of the languages of the world to be symbolized with a special character identification.

a)

Unicode

b)

ASCII

c)

Unicorn

d)

ASC2

78.

A code for representing English characters as numbers, with each letter assigned a number from 0 to 127

a)

Unicode

b)

ASCII

c)

Unicorn

d)

ASC2

79.

Short for "picture element". A tiny square or dot which contains a single point of color of a larger image.

a)

pictelem

b)

pixel

c)

picem

d)

pickel

80.

A type of colour depth that only uses Black and White

a)

1-bit

b)

2-bit

c)

16-bit

d)

Monochrome

81.

A type of colour depth that has 4 colours (often used as grayscale).

a)

1 bit

b)

2 bit

c)

3 bit

d)

4 bit

82.

A type of colour depth that has 8 colours

a)

1 bit

b)

2 bit

c)

3 bit

d)

8 bit

83.

The number of bits used per pixel.

a)

Bit depth

b)

Colour depth

c)

Resolution

d)

Image size

84.

Data that describes other data

a)

XML data

b)

Linked data

c)

Metadata

d)

Directory data

85.

The number of pixels or dots per unit, often referred to as ppi (pixels per inch) or dpi (dots per inch).

a)

Sharpness

b)

Colour depth

c)

Resolution

d)

Image size

86.

A continuously changing wave such as natural sound.

a)

Analogue

b)

Digital

c)

Binary

d)

Fluid

87.

The number of bits used to store each sound sample.

a)

Bit depth

b)

Bit rate

c)

Bit number

d)

Sound bits

88.

The number of bits used to store a second of sampled sound.

a)

Bit depth

b)

Bit rate

c)

Bit number

d)

Sound bits

89.

The number of times per second the sound is sampled.

a)

Sample rate

b)

Bit rate

c)

Bit depth

d)

Sample speed

90.

The unit of audio sampling rates.

a)

kHz

b)

KB

c)

KS

d)

KSz

91.
The number of samples taken at each fixed interval
a)
Bit Rate
b)
Sample rate
92.

How many combinations of binary numbers can you make with a Bit Rate of 4?

a)

2

b)

16

c)

65000

93.
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.
94.

Convert the binary number 1110 to decimal.

a)

3

b)

10

c)

15

d)

14

95.

Convert 64 to binary

a)

10000000

b)

01111110

c)

01000000

d)

11001100

96.
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
97.
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
98.

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.

99.
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
100.
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
101.

The resolution of an image refers to the quality of the image.

a)

TRUE

b)

FALSE

102.
A byte is
a)
8 bits
b)
4 bits
103.

Analogue sound signals are...

a)

continuous

b)

discrete

104.

Sound resolution can also be identified as the...

a)

sample rate

b)

audio bit depth

c)

wave length

d)

frequency rate

105.

The greater the frequency, the..... (pick two)

a)

lower the accuracy

b)

lower the file size

c)

greater the accuracy

d)

greater the file size

106.

the more bits used per sample enables the height of the wave...

a)

to be more accurately measured

b)

to be less accurately measured

c)

increases file size

d)

decreases file size

107.

Recording quality improves....(pick two)

a)

the LESS accurately we record the wave height

b)

the MORE frequently we sample the sound

c)

the MORE accurately we record the wave height

d)

the LESS accurately we record the wave height

108.

Our hearing range is measured in.....

a)

Cycles Per Second

b)

Hertz

c)

Fresnel

d)

Kilohertz

109.

Lossy Compression removes the sounds in the frequency ranges that we can't easily hear?

a)

True

b)

False

110.

Lossless compression leaves out repeated data?

a)

True

b)

False

111.

which uncompressed file format(s) can be used instead of an Mp3? (tick multiple)

a)

.wav

b)

.aiff

c)

.m4a

d)

.aac

e)

mp4

112.

which uncompressed file format(s) can be used instead of an .jpg? (tick multiple)

a)

.tif

b)

.bmp

c)

.gif

d)

.jpeg2000

113.

Tick ALL LOSSY Compression files

a)

.jpg

b)

.mp3

c)

.png

d)

.gif

e)

.tif

114.

Tick ALL LOSSLESS compression files

a)

.png

b)

.jpg

c)

.tif

d)

.svg

e)

.mp3

115.

Complete a 1 place left shift on the binary number:

0 0 0 1 0 0 0 1

a)

1 0 0 0 1 0 0 0

b)

00 0 1 0 0 0 1

c)

0 0 1 0 0 0 1 0

d)

0 0 1 0 0 0 1 1

116.

Complete a 1 place left shift on the binary number:

0 0 0 0 0 0 0 1

a)

0 0 0 0 0 0 0 0

b)

1 0 0 0 0 0 0 0

c)

0 0 0 0 0 0 1 1

d)

0 0 0 0 0 0 1 0

117.

Complete a 1 place right shift on the binary number:

0 0 0 0 0 1 0 0

a)

0 0 0 0 0 1 0 0

b)

1 0 0 0 0 0 1 0

c)

0 0 0 0 0 0 1 1

d)

0 0 0 0 0 0 1 0

118.

Complete a 2 place right shift on the binary number:

0 1 1 0 1 0 0 0

a)

1 1 1 0 1 0 0 1

b)

0 0 0 1 1 0 1 0

c)

0 1 1 0 1 0 0 0

d)

1 0 1 0 0 0 0 0

119.

Complete a 2 place left shift on the binary number:

0 0 1 1 0 0 0 1

a)

1 1 0 0 0 1 0 0

b)

1 1 0 0 1 1 0 0

c)

0 0 1 1 0 0 0 1

d)

1 1 0 0 0 1 1 1

120.

Complete a 1 place right shift on the binary number:

0 0 0 0 1 1 0 0



(a)  

121.

Complete a 2 place right shift on the binary number:

0 1 1 0 1 0 0 0



(a)  

122.

Complete a 1 place left shift on the binary number:

1 0 1 1 0 0 0 1



(a)  

123.

Complete a 2 place left shift on the binary number:

0 1 0 1 1 0 0 1

(a)  

124.

A binary shift 1 place to the left is the equivalent to what arithmetic operation?

a)

Multiplying the number by 2

b)

Multiplying the number by 4

c)

Dividing the number by 2

d)

Dividing the number by 4

125.

A binary shift 2 places to the left is the equivalent to what arithmetic operation?

a)

Multiplying the number by 2

b)

Multiplying the number by 4

c)

Dividing the number by 2

d)

Dividing the number by 4

126.

A binary shift 2 places to the right is the equivalent to what arithmetic operation?

a)

Multiplying the number by 2

b)

Multiplying the number by 4

c)

Dividing the number by 2

d)

Dividing the number by 4

127.

A binary shift 1 place to the left is the equivalent to what arithmetic operation?

a)

Multiplying the number by 2

b)

Multiplying the number by 4

c)

Dividing the number by 2

d)

Dividing the number by 4

128.

How does a computer represent an unsigned integer?

a)

Using only positive and negative numbers

b)

Using only positive numbers, including zero

c)

Using a combination of positive numbers and fractions

d)

Using letters instead of numbers

129.

What is the main advantage of using two's complement to represent signed integers?

a)

It allows for easier multiplication of large numbers

b)

It simplifies the process of adding and subtracting negative numbers

c)

It increases the range of positive numbers that can be represented

d)

It requires fewer bits than other methods

130.

How is the number -5 represented in an 8-bit two’s complement system?

a)

11111011

b)

11111010

c)

00000101

d)

10000101

131.

In an 8-bit unsigned integer system, what is the maximum value that can be represented?

a)

127

b)

128

c)

255

d)

256

132.

In an 8-bit two’s complement system, what is the range of values that can be represented?

a)

-128 to 127

b)

-127 to 128

c)

0 to 255

d)

-255 to 254

133.

What happens to the most significant bit (MSB) in a two’s complement signed integer?

a)

It is used to indicate the number of bits

b)

It is used to store the sign of the number (positive or negative)

c)

It always stays at zero

d)

It alternates between 0 and 1 for even numbers

134.

How is the number -1 represented in an 8-bit two's complement system?

a)

10000000

b)

11111111

c)

00000001

d)

11111110

135.

What is the result of adding 1 to the maximum value of an 8-bit unsigned integer (255)?

a)

The result is 0, and an overflow occurs

b)

The result is -255

c)

The result is 256

d)

The result is 255

136.

Which of the following correctly represents the two's complement of the binary number 00010100 (which represents -21 in decimal)?

a)

11101011

b)

11101000

c)

10001011

d)

00010101

137.

In a 16-bit two's complement system, what is the decimal equivalent of the binary number 11111111 11111100?

a)

-4

b)

-3

c)

252

d)

65532

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