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Lesson details
Key learning points
- In this lesson, we will look at character coding systems. First, we will consider character coding systems that you might have come across before, such as semaphore and Morse code, then we will be introduced to ASCII, a standard coding system for representing text. Next, we will learn about the need for Unicode to extend ASCII. Finally, we will learn how to work out the size of a plain text file.
Licence
This content is made available by Oak National Academy Limited and its partners and licensed under Oak’s terms & conditions (Collection 1), except where otherwise stated.
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3 Questions
Q1.How many characters are in the ASCII character set?
How many characters are in the ASCII character set?
256
32
64
Q2.How many bits of storage are used for each character?
How many bits of storage are used for each character?
2
4
6
Q3.What is the name for the character set that was introduced after ASCII and can hold thousands of characters?
What is the name for the character set that was introduced after ASCII and can hold thousands of characters?
Binary
Cyrillic
Hexadecimal