Ch 14 · Check Your Understanding · Theory
Topic 14 of 14 in Data Representation — How Computers Store Everything as Numbers — 4 lessons.
Number Systems
Two's Complement
Media & Compression
You've Got the Foundation
You can now explain how a computer stores whole numbers, negative numbers, fractions, text, images and sound — all as binary — and reason about file sizes and compression. This is the bedrock every other computer-science topic sits on.
All topics in Theory Data-representation
- Why Computers Use Binary
- Counting in Binary
- Hexadecimal — Shorthand for Binary
- Binary Addition & Overflow
- Negative Numbers — Two's Complement
- Logical Binary Shifts
- Representing Text
- Representing Images
- Representing Sound
- Storage Units & Compression
- Floating-Point Numbers (A Level)
- More Number Representations
- File Organisation & Access (A Level)
- Check Your Understanding