What is a BIT
—As we know a bit is
the smallest unit of data in a computer system
—
—A bit can either be a
12 or a 02
—
—This means that with
one single bit we can only represent only 2 different values
—
—12 =
110 and 02 = 010
Representing Text, Pictures etc …
—Text, pictures and
videos are also stored in a computer system using a sequence of binary digits
— Using one single bit
is not enough due to its small size
—
—If we want to store a
large quantity of data many more bits are required.
—
Combining a number of Bits
—Each time a bit is
combined with another bit, more different combinations can be stored.
—
—If we will be using
two bits to store data, there are a total of 22=
4 different combinations
—
—Hence if we have 4
bits we would have 24= 16 different combinations
Working
—With the following
number of bits how many combinations could be created?
1.5 bits
2.3 bits
3.6 bits
4.8 bits
Answers
1.5 bits = 25 à 32 combinations
●
2.3 bits = 23 à 8 combinations
●
3.6 bits = 26 à 64 combinations
●
4.8 bits = 28 à 256 combinations
List of Combination
|
Number of Bits
|
Calculation
|
Number of Combinations
|
|
1
|
21
|
2
|
|
2
|
22
|
4
|
|
3
|
23
|
8
|
|
4
|
24
|
16
|
|
5
|
25
|
32
|
|
6
|
26
|
64
|
|
7
|
27
|
128
|
|
8
|
28
|
256
|
—