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WorksheetsAQA GCSE Computer Science - 3.3.5 Character Encoding
Total questions: 20
Worksheet time: 7mins
Name
Class
Date
1.
What does ASCII stand for?
a)
American Standard Code for Information Interchange
b)
Australian Standard Code for Information Interchange
c)
American Standard Character Information for Interchange
d)
Australian Standard Character Information Interchange
2.
How many different characters does 7 bit ASCII have?
a)
128
b)
64
c)
256
d)
512
3.
What is one way unicode better than ASCII?
a)
It contains all characters in the world
b)
It has built-in encryption
c)
It takes up less data to store characters
d)
It uses checksums to validate characters
4.
What did unicode assign each character to
a)
An Integer
b)
A string of binary digits
c)
A number from 0 to 1
d)
A string of ASCII digits
5.
Which Character encoding would be used to store emojis?
a)
unicode
b)
ASCII
c)
Both
d)
Neither
6.
Which Character encoding uses less space on average?
a)
ASCII
b)
unicode
c)
They are both the same
d)
They are made up by a government agency to trick the world into tranquillity. (I ran out of a MC option)
7.
Which character encoder is standardized?
a)
Both
b)
unicode
c)
ASCII
d)
Neither
8.
How many characters can 8 bit ascii encode?
a)
256
b)
128
c)
512
d)
1024
9.
How many bits does UTF-8 use
a)
32
b)
8
c)
24
d)
16
10.
How many extra characters does extended ASCII add
a)
128
b)
64
c)
256
d)
96
11.
What is the lowest printable value in ASCII
a)
32
b)
65
c)
0
d)
1
12.
What is the character of the lowest printable value in ASCII
a)
space
b)
a
c)
0
d)
A
13.
What is the value for 'B' in ASCII
a)
66
b)
65
c)
97
d)
98
14.
What is the value for 'b' in ASCII
a)
98
b)
97
c)
66
d)
65
15.
Which of these is not a character in 7 bit ASCII
a)
é
b)
~
c)
@
d)
`
16.
What is 01100100 in 8 bit ASCII
a)
d
b)
c
c)
e
d)
f
17.
Using 8 bit ASCII, how many bits would 'Hello World' be
a)
88
b)
80
c)
96
d)
104
18.
Using 7 bit ASCII how many bits would 'Hello World' be
a)
77
b)
70
c)
84
d)
91
19.
Which decade was ASCII developed
a)
1960's
b)
1970's
c)
1950's
d)
1940's
20.
What is meant by resolution?
a)
The concentration of pixels within a specific area
b)
The size of a physical pixel
c)
The number of pixels in an image
d)
A high definition image or video
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