Chapter 1.4, Problem 3QE

a.

Explanation of Solution

Determine the given sentence in ASCII code:

• To find the given text message in ASCII code that uses 8-bits per symbol, first represent the sentence in the hexadecimal notation through the ASCII table. The ASCII table using hexadecimal digits is shown below:

The hexadecimal notation of each character present in the sentence is shown below,

$\begin{array}{l}"=22\\ \text{S}=53\\ \text{t}=\text{74}\\ \text{o}=6\text{F}\end{array}$

$\begin{array}{c}\text{p}=70\\ !=21\\ "=22\\ =20\end{array}$

$\begin{array}{c}\text{C}=43\\ \text{h}=\text{68}\\ \text{e}=65\\ \text{r}=72\end{array}$

$\begin{array}{c}\text{y}=79\\ \text{l}=6\text{C}\\ \text{=20}\\ \text{s}=73\end{array}$

$\begin{array}{l}\text{h}=68\\ \text{o}=6\text{F}\\ \text{u}=75\\ \text{t}=74\end{array}$

$\begin{array}{c}\text{e}=65\\ \text{d}=64\\ .=2\text{E}\end{array}$

• To convert the above result in 8-bits pattern, write every digit and word of the hexagonal notation in binary numbers having $4$ bits

b.

Explanation of Solution

Determine the given sentence in ASCII code:

• To find the given text message in ASCII code that uses 8-bits per symbol, first represent the sentence in the hexadecimal notation through the ASCII table. The ASCII table using hexadecimal digits is shown below:

The hexadecimal notation of each character present in the sentence is shown below,

$\begin{array}{c}\text{D}=44\\ \text{o}=6\text{F}\\ \text{e}=65\\ \text{s}=73\end{array}$

$\begin{array}{c}=20\\ 2=32\\ +=2\text{B}\\ 3=33\end{array}$

$\begin{array}{c}==3\text{D}\\ \text{5}=\text{35}\\ ?=3\text{F}\end{array}$

• To convert the above result in 8-bits pattern, write every digit and word of the hexagonal notation in binary numbers having $4$ bits