Digital Information: Storing Text in Binary

Question 1

Encodings

Answer 1

mappings from a character to a binary number

Question 2

How any symbols can the 2-bit encoding represent? and why

Answer 2

4 bc 00, 01, 10, 11

Question 3

ASCII encoding stands for

Answer 3

American Standard Code for Information Interchange

Question 4

ASCII encoding

Answer 4

the most common character encoding format for text data in computers and on the internet

Question 5

Each ASCII character is encoded in binary using how many bits

Answer 5

7

Question 6

problems of the ASCII encoding

Answer 6

• only English characters
• represents characters with 7 bits which wastes memory for computers that store info in bytes

Question 7

Unicode

Answer 7

a universal character set which assigns each character a code point and a name to each character

Question 8

How are the characters in the ASCII table converted to be stored into a computer

Answer 8

the characters are converted to decimal and then to binary

Question 9

What problem did Unicode solve of ASCII and how did they do so

Answer 9

they fixed the fact that ASCII only had English and they did this by making characters that were used by all the languages + the individual ones with more specific codes and names

Question 10

example of something in Unicode

Answer 10

“ą” is assigned to “U+0105” and named “Latin Small Letter A with Ogonek”

Question 11

Unicode ___ (is/is not) a character set but it ____ (is/is not) an encoding

Answer 11

is, is not

Question 12

UTF-8

Answer 12

an encoding that is compatible with ASCII encoding but also solves its problems because it can describe the characters in Unicode with 1-4 bytes

Question 13

how do you know if a character is demonstrated by a UTF sequence

Answer 13

if the first number is a 0, the first two numbers are 1, start with 1110, orstart with 11110

Question 14

what kind of encoding do most html files use

Answer 14

utf-8