ASCII

Question 1

what does ascii stand for

Answer 1

american standard code for interchange

Question 2

how many possible characters

Answer 2

256

Question 3

how many of the possible characters does ascii use

Answer 3

128

Question 4

how many of the 128 characters are printable

Answer 4

96

Question 5

what are the non printable characters

Answer 5

control codes eg enter button

Question 6

what is the difference between a character and a value

Answer 6

eg the value 1 is used for arithmetic in the computer but the character 1 is in a human readable form

Question 7

how do we differentiate a number value from a number character

Answer 7

quotation marks around charcater

Question 8

what is the hexadecimal difference always between upper and lower case letters

Answer 8

0x20

Question 9

how do we convert between characters and their values (numbers in ascii code)

Answer 9

subtract 0x30 from their ascii code

Question 10

whats more efficient, storing numbers in their value or character form. Why?

Answer 10

value form, the value is stored in 1 byte where as each character inn the value will be stored in a byte, WE CANNOT PREFROM ARITHMATIC USING CHARACTERS