Coding Scheme
What is a coding scheme
Standards that computers use to convert and represent data in format that machines can understand
What does ASCII stand for?
American Standard code for information interchange
What is the difference between ASCII and extended ASCII?
ASCII is a 7-bit character encoding system that supports 128 characters (0–127), whereas Extended ASCII is an 8-bit system that supports 256 characters (0–255)
What is Unicode?
universal character encoding standard that assigns a unique numeric value to every character across all writing systems, symbols, and emojis in the world.
Why are coding schemes are used?
Computers can't interpret human readable characters like letters, numbers, symbols etc. It is used to translate into machine readable format.
Why there was a need for ASCII?
Different model of computers couldn't communicate with each other. Each device represented their own alphabets, numerals and characters.
What does ANSI stands for?
American National Standard Institutue
How does Unicode differ from ASCII?
ASCII is a 7-bit character set that supports 128 basic English letters, numbers, and symbols, while Unicode is a universal standard that assigns unique code to global languages, math symbols, and emojis
State Benefits of using coding scheme.
Data Representation, Standardization, efficiency, communication
How many characters can ASCII represent?
128
Name the commands that 32 code combinations used?
start of text, carriage return, form feed
Unicode stands for
universal coding scheme
What is the difference between a coding scheme and a programming language?
a coding scheme defines how raw data, characters, or symbols are mapped into binary values, whereas a programming language is a formal set of syntax and grammar used to write instructions, logic, and algorithms that a computer executes
What does EBCDIC stands for?
Extended Binary coded Decimal Interchange
What does it mean by printable information?
any digital document or file like Word document that is designed to be downloaded and printed onto paper using printer
how many characters does unicode supports?
100,000
Describe a real-world application of a coding scheme.
When you type a message on a keyboard or save a plain text file (.txt), your computer uses the ASCII scheme
What is the primary purpose of ASCII?
Assigns standard numeric values to alphabets, numerals, punctuation mark used in computer.
Why was extended ASCII developed?
to expand the original 7-bit character set into an 8-bit system, increasing the number of available symbols from 128 to 256
UTF stands for?
Unicode Transformation Format