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Worksheets2.6 Data Representation End of Topic Quiz
Total questions: 91
Worksheet time: 1hrs 12mins
Name
Class
Date
1.
How many MB is in 1 GB?
a)
10
b)
100
c)
1000
d)
10000
2.
How many MB is in 10 GB?
a)
10000
b)
100000
c)
1000
d)
10000000
3.
How many MB is in 100 GB?
a)
10000
b)
100000
c)
1000
d)
10000000
4.
A digit has been added to the end of a binary number to check that it has been sent and received correctly. This digit is calculated from the digits in the binary number.
a)
Check Digit
b)
Check Bit
c)
Checking Bit
d)
Checking Digit
5.
Binary is used to represent data because ...
a)
it is easier
b)
it is quicker
c)
Computers are made up of electrical circuits 1 = On ... 0 = Off
d)
Computers are made up of electrical components
6.
What parity bit has been added to the end of the binary numbers (in red)
a)
EVEN
b)
ODD
7.
What parity bit has been added to the end of the binary numbers (in red)
a)
EVEN
b)
ODD
8.
I am using EVEN PARITY on the following binary number ... 1 0 0 0 1 0 0 0 ...
Which is the correct one?
Which is the correct one?
a)
1 0 0 0 1 0 0 0 1
b)
1 0 0 0 1 0 0 0 0
c)
1 0 1 0 1 0 0 0 0
d)
1 0 1 0 1 0 0 0 1
9.
I am using ODD PARITY on the following binary number ... 1 0 1 0 1 0 1 0 ...
Which is the correct one?
Which is the correct one?
a)
1 0 1 0 1 0 1 0 1
b)
1 0 1 0 1 0 1 0 0
c)
1 0 1 0 1 0 1 1 1
d)
1 1 1 0 1 0 1 0 1
10.
Convert the Binary number 1 0 0 1 0 0 0 1 into Denary
a)
144
b)
145
c)
146
d)
147
11.
Convert the Binary number 0 0 0 1 0 0 1 1 into Denary
a)
17
b)
18
c)
19
d)
20
12.
Convert the Denary number 129 into Binary
a)
1 0 0 0 0 0 0 1
b)
1 0 0 0 0 0 0 1
c)
1 0 0 0 0 1 1 1
d)
1 0 0 0 0 0 1 1
13.
Convert the Denary number 200 into Binary
a)
1 1 0 0 1 1 0 1
b)
1 1 1 0 1 0 0 0
c)
1 1 0 0 1 0 0 0
d)
1 1 0 0 1 0 0 1
14.
What is the answer ?
0 1
+ 1 0
_____
0 1
+ 1 0
_____
a)
01
b)
10
c)
11
d)
100
15.
What is the answer ?
0 1 0
+ 1 0 1
______
0 1 0
+ 1 0 1
______
a)
010
b)
101
c)
110
d)
111
16.
What is the answer ?
0 0 1
+ 1 0 1
______
0 0 1
+ 1 0 1
______
a)
010
b)
101
c)
110
d)
111
17.
What is the answer ?
1 0 1
+ 1 0 1
_______
1 0 1
+ 1 0 1
_______
a)
1011
b)
1010
c)
1100
d)
1111
18.
What is the answer ?
1 1 1 1 1 1 1 1
+ 0 0 0 0 0 0 0 1
_______________
1 1 1 1 1 1 1 1
+ 0 0 0 0 0 0 0 1
_______________
a)
000000001
b)
111111110
c)
100000000
d)
111100001
19.
2 Place left shift on the binary number
0 0 0 1 1 0 1 0
What is the correct answer?
0 0 0 1 1 0 1 0
What is the correct answer?
a)
1 1 1 0 0 1 0 1
b)
0 0 0 1 1 0 1 0
c)
0 0 1 1 0 1 0 0
d)
0 1 1 0 1 0 0 0
20.
4 Place left shift on the binary number
0 0 0 1 1 0 1 0
What is the correct answer?
0 0 0 1 1 0 1 0
What is the correct answer?
a)
1 1 1 0 0 1 0 1
b)
1 0 1 0 0 0 0 0
c)
0 0 1 1 0 1 0 0
d)
0 1 1 0 1 0 0 0
21.
2 Place right shift on the binary number
0 0 0 1 1 0 1 0
What is the correct answer?
0 0 0 1 1 0 1 0
What is the correct answer?
a)
0 0 0 0 0 1 1 0
b)
0 0 0 0 0 1 1 1
c)
0 0 0 0 1 0 1 0
d)
0 1 1 0 1 0 0 0
22.
Left shifts multiplies a binary number?
a)
TRUE
b)
FALSE
23.
Right shifts divides a binary number?
a)
TRUE
b)
FALSE
24.
For every place shifted to the left ... the binary number is doubled.
a)
TRUE
b)
FALSE
25.
For every place shifted to the right... the binary number is doubled.
a)
TRUE
b)
FALSE
26.
What is the hex FF in Denary
a)
252
b)
253
c)
255
d)
256
27.
Is 255 the largest denary number that can be made using 2 hex characters?
a)
TRUE
b)
FALSE
28.
What is hex A in Denary
a)
10
b)
11
c)
12
d)
13
29.
What is hex C in Denary
a)
10
b)
11
c)
12
d)
13
30.
What is hex A5 in Denary
a)
162
b)
163
c)
164
d)
165
31.
What is hex 14 in Denary
a)
18
b)
20
c)
22
d)
24
32.
What is denary 20 in Hex?
a)
14
b)
16
c)
18
d)
20
33.
What is denary 32 in Hex?
a)
14
b)
16
c)
18
d)
20
34.
What is the following binary number in hex
1 0 0 1 1 0 1 0
1 0 0 1 1 0 1 0
a)
8 A
b)
9 A
c)
8 B
d)
9 B
35.
What is the following binary number in hex
1 1 1 1 0 0 1 0
1 1 1 1 0 0 1 0
a)
F A
b)
F 1
c)
F 2
d)
F 4
36.
What is the following hex number in binary?
F A
F A
a)
1 0 1 0 1 1 1 1
b)
0 0 0 0 1 1 1 1
c)
1 1 1 1 1 0 1 0
d)
1 1 1 1 0 1 0 1
37.
What is the following hex number in binary?
2 6
2 6
a)
0 0 1 0 0 1 1 0
b)
0 0 1 1 0 1 1 0
c)
0 0 1 0 1 1 1 0
d)
1 0 1 0 0 1 1 0
38.
Hex is easier to work with than binary because it is shorter and easier to identify.
a)
TRUE
b)
FALSE
39.
Graphic designers use hex numbers to choose colours rather than binary because they are easier to edit
a)
TRUE
b)
FALSE
40.
Network managers use hex numbers to identify components on a network
a)
TRUE
b)
FALSE
41.
A collection of characters a computer recognises from their binary representation
a)
Group of characters
b)
Character group
c)
Character set
d)
Character keys
42.
Which is the correct order to display a letter on the screen?
a)
1] A letter is pressed
2] Character set is used to translate the binary code
3] Binary code is sent to the computer
4] Letter is displayed
2] Character set is used to translate the binary code
3] Binary code is sent to the computer
4] Letter is displayed
b)
1] A letter is pressed
2] Binary code is sent to the computer
3] Character set is used to translate the binary code
4] Letter is displayed
2] Binary code is sent to the computer
3] Character set is used to translate the binary code
4] Letter is displayed
c)
1] Letter is displayed
2] Character set is used to translate the binary code
3] Binary code is sent to the computer
4] A letter is pressed
2] Character set is used to translate the binary code
3] Binary code is sent to the computer
4] A letter is pressed
d)
1] Letter is displayed
2] Character set is used to translate the binary code
3] A letter is pressed
4] Binary code is sent to the computer
2] Character set is used to translate the binary code
3] A letter is pressed
4] Binary code is sent to the computer
43.
Using more bits to represent characters decreases the size of the character set
a)
TRUE
b)
FALSE
44.
How many bits does standard ASCII have?
a)
7
b)
8
c)
16
d)
32
45.
How many bits does Unicode UTF-32 have?
a)
7
b)
8
c)
16
d)
32
46.
How many characters can standard ASCII represent?
a)
128
b)
256
47.
How many characters can extended ASCII represent?
a)
128
b)
256
48.
Standard ASCII can represent characters from other languages such as Greek / Chinese / Russian
a)
TRUE
b)
FALSE
49.
What is the ASCII code for ... A?
a)
65
b)
56
c)
97
d)
79
50.
What is the ASCII code for ... O?
a)
78
b)
76
c)
88
d)
79
51.
What is the following word ... 67 65 84
a)
CAT
b)
COT
c)
CAR
d)
BAT
52.
What is compression?
a)
To convert one file to another
b)
To reduce the size of data to save space
c)
To minimise the time taken for a file to be download
d)
To compress something by pressing it hard
53.
What does Lossy Compression do to files?
a)
Increases the file size and keeps the same quality
b)
Eliminates no information at all
c)
Decreases the file size and keeps the same quality
d)
Eliminates unnecessary information in a file to reduce file size
54.
What is Lossless Compression?
a)
No information is lost but file size is increased
b)
There is no loss of information at all after compression
c)
Files which have the exact same data after compression
d)
Compression involves an algorithm
55.
What type of compression does the ZIP format use?
a)
Lossy
b)
Lossless
56.
What type of compression would you use to compress a video?
a)
Lossy
b)
Lossless
57.
What type of compression would you use to compress a text file?
a)
Lossy
b)
Lossless
58.
When Lossy compression is used data is lost?
a)
True
b)
False
59.
Which of the following are not in a compressed format?
a)
JPEG
b)
MPEG
c)
Bitmap
d)
MP3
60.
Data compression is important for websites because:
a)
Your webpage will load faster
b)
Compressed images look better
61.
An mp3 is a compressed music file
a)
True
b)
False
62.
A jpeg is a compressed image file.
a)
True
b)
False
63.
Makes the file smaller by deleting parts of the file permanently (forever)
a)
Lossy Compression
b)
Lossless Compression
64.
Makes the file smaller by giving repeated patterns/colours a specific code
a)
Lossy Compression
b)
Lossless Compression
65.
Which of these is an advantage for Lossy compression?
a)
The file size becomes significantly (much) smaller
b)
The file size does not become much smaller than 50%
66.
Which of these is an advantage for Lossless compression?
a)
The file size becomes significantly (much) smaller
b)
The file size does not become much smaller than 50%
67.
Has this been compressed using Lossy or Lossless?
a)
Lossy
b)
Lossless
68.
Bitmap or 'raster' graphics are made up of _______
a)
Shapes and lines
b)
Pixels
69.
Vector graphics are made up of _______
a)
Shapes and lines
b)
Pixels
70.
Vector graphics are 'cartoon like', whereas raster graphics are of real life - True or False?
a)
True
b)
False
71.
A pixel is the _______ part of an image.
a)
Smallest
b)
Largest
72.
The colour of a pixel can be stored as a _______ number
a)
Unicode
b)
Hex
c)
Binary
d)
ASCII
73.
Each pixel is displayed using a combination of what three colours?
a)
Blue, green and purple
b)
Red, grey and white
c)
Red, green and blue
d)
White, red and blue
74.
Picture resolution refers to the concentration of pixels. How is it usually measured?
a)
Dots per inch (DPI)
b)
Dots per image (DPI)
c)
Pixels per inch (PPI)
d)
Pixels per image (PPI)
75.
What is meant by the term 'colour depth'?
a)
Width and height of an image.
b)
A pixel in an image.
c)
Quality of the colour.
d)
Number of bits used to encode each pixel.
76.
The higher the colour depth, the _________the image file size.
a)
Smaller
b)
Larger
77.
The higher the resolution, the ____ the file size.
a)
Smaller
b)
Larger
78.
Define what is meant by the term 'metadata'.
a)
Metadata is the smallest element of an image.
b)
Metadata is the number of bits used to store the colour of a pixel.
c)
Metadata refers to information stored about an image.
d)
Metadata is a lossy compression file format that allows for very compact file sizes.
79.
Which of the following is NOT metadata that could be stored about an image?
a)
Pixel width and height.
b)
Picture resolution measured in DPI
c)
Camera name and model.
d)
Printer description
80.
The number of bits per pixel determines the number of possible colours.
a)
TRUE
b)
FALSE
81.
The higher the number of bits per pixel, the more colours that can be represented
a)
TRUE
b)
FALSE
82.
What unit is sample rate measured in?
a)
Bits per second (bps)
b)
Hertz (Hz)
c)
Megabits per second (Mbps)
83.
Which of the following is not true if you increase the sample rate?
a)
Better quality of recording
b)
Needs greater storage space
c)
larger file size
d)
Decrease in quality
84.
What is meant by bit depth?
a)
The number of samples taken per second
b)
The amplitude of each sample
c)
The number of bits used per second of audio
d)
The number of bits used to store each sound sample
85.
Which of the following is true if you decrease the bit rate?
a)
File size increases
b)
Sound quality increases
c)
Sound quality decreases
d)
Number of sound samples taken per second increases
86.
What is measured when the wave is sampled?
a)
Amplitude
b)
Hertz
c)
Bit rate
d)
Frequency
87.
What sample rate is used for CD quality sound?
a)
44,100 Hz
b)
88,200 Hz
c)
22,100 Hz
88.
The purpose of a Digital to Analogue converter is to…
a)
convert binary data into analogue form so we can hear it via a speaker
b)
convert sound waves into binary so it can be understood by a computer
89.
What piece of hardware would you use to input sound into a computer?
a)
Speaker
b)
Analogue to digital converter
c)
Microphone
d)
Digital to analogue converter
90.
If you increase the bit depth of an audio file then you increase the quality?
a)
True
b)
False
91.
The amplitude of a sound wave is…
a)
how high the wave is from the crest or trough
b)
the frequency at which it is sampled
c)
the speed at which it travels through air
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