Unit 1: Data representation in a computer
Lesson 1, 2 and 3
Questions and Answers (the red texts are the answers)
1. What is binary
number? Choose one of the following:
a) A
sequence of 1s and 0s.
b) The way a
computer speaks.
c) A useless code that
is no longer used.
2. What kind of
“base” system is binary number known as?
a) Base 10
b) Base
2
c) Base 16
3. What kind of
number system is used in everyday life?
a) Denary
(Base 10)
b) Binary
c) A simple number
system.
4. What would the
denary number 199 be in binary?
a) 11000110
b) 10100111
c) 11000111
5. What would the
denary number 55 be in binary?
a) 00110111
b) 00101111
c) 01010111
6. What would the
denary number 222 be in binary?
a) 11010110
b) 10111110
c) 11011110
7. What would
10110010 be as a denary number?
a) 168
b) 178
c) 56
8. What would 00101110
be as a denary number?
a) 46
b) 36
c) 56
9. A single unit
which is composed of small group of bits is knows as
a) Bit
b) Bug
c) Flag
d) Byte
10.What form must
data be in for a computer to be able to process it?
a) Binary
b) Denary
c) Binary
or denary
11.How many
characters can the default ASCII code store?
a) 129
b) 128
c) 266
12.What does an
analogue to digital converter do?
a) Samples
a sound wave at regular intervals then converts these to binary.
b) Makes an image
smaller.
c) Assigns binary
code to text.
(@Eng.
Saleebaan Colaad Jaamac)
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