Question

1. A computer functions because electricity and data storage, at its lowest level (a “bit”) can be set to either On or Off. Why is an ASCII table useful in understanding how a computer interacts with a person? (Pick the best answer.)

______ It lists all the possible characters a computer can understand

______ It maps characters on a keyboard to various number systems so that ultimately you can reach a correlation between these characters and their corresponding binary numbers

______ It allows Excel users to write characters with their numerical equivalent in cases where the use of characters in cells of a worksheet are not allowed.

Answer 1

Second is the best answer.

It maps characters on a keyboard to various number systems so that ultimately you can reach a correlation between these characters and their corresponding binary numbers

Computer does not understand character . It only understand numbers . Ascii table helps in mapping these two. There are multiple number systems like binary , ocatal , decimal and hexadecimal that are very popular.

binary number system has base 2. possible digits ( 0 or 1)

octal number system has base 8. possible digits ( 0 ... 7)

decimal number system has base 10. possible digits (0 ... 9)

hexademial number system has base 16. possible digits (0 ...9 A B C D E F)