Memory & StorageKey Facts

Unicode: The Universal Solution

Part of Character SetsGCSE Computer Science

This key facts covers Unicode: The Universal Solution within Character Sets for GCSE Computer Science. Revise Character Sets in Memory & Storage for GCSE Computer Science with 15 exam-style questions and 18 flashcards. This topic appears less often, but it can still be a useful differentiator on mixed-topic papers. It is section 5 of 10 in this topic. Use this key facts to connect the idea to the wider topic before moving on to questions and flashcards.

Topic position

Section 5 of 10

Practice

15 questions

Recall

18 flashcards

Unicode: The Universal Solution

Unicode Overview:

  • Coverage: 143,859 characters (as of Unicode 15.0)
  • Languages: 159 modern and historic writing systems
  • Includes: Every language, emoji, math symbols, ancient scripts, musical notation
  • Backward compatible: First 128 codes match ASCII
  • Goal: Every character in every language gets ONE unique code

Unicode Examples:

  U+0041:  A (Latin A)
  U+03A9:  Ω (Greek Omega)
  U+4E2D:  中 (Chinese "middle")
  U+0628:  ب (Arabic letter beh)
  U+1F600: 😀 (Grinning face emoji)
  U+1F4A9: 💩 (Pile of poo emoji)
  U+00E9:  é (e with acute accent)
  

Keep building this topic

Read this section alongside the surrounding pages in Character Sets. That gives you the full topic sequence instead of a single isolated revision point.

Practice Questions for Character Sets

How many bits does standard ASCII use to represent each character?

  • A. 4 bits
  • B. 7 bits
  • C. 8 bits
  • D. 16 bits
1 markfoundation

Explain why using Unicode to store a text file produces a larger file than using ASCII to store the same text.

3 marksstandard

Quick Recall Flashcards

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