IGCSE Computer Science (0478)
    • Chapter 6: Automated & Emerging Technologies
    • Data Representation
      • Introduction
      • Why computers use binary (how binary represents data)
      • Number system
        • Introduction
        • Number Conversions
        • Addition of Binary Numbers
        • Logical binary shifts (positive 8-bit integers)
        • Two’s Complement (Signed: Positive and Negative Numbers)
        • Use of the Hexadecimal System
      • Text, Sound and Image
        • Text, Sound and Images
        • File Types
      • Data storage and File compression
        • Measurement of the Size of Computer Memories
        • Lossless and Lossy File Compression
    • Hardware
      • Computer Architecture
        • The CPU & Microprocessors
        • Von Neumann Architecture
        • Fetch-Decode-Execute Cycle (FDE)
        • Characteristics of the CPU
        • CPU Instruction Sets
        • Embedded Systems
      • Input/output devices
        • Input devices
        • Output devices
        • Sensors
      • Data Storage
        • What is Primary Storage?
        • What is Secondary Storage?
        • What is Virtual Memory?
        • What is cloud storage?
      • Network hardware
        • What is a Network Interface Card(NIC)?
        • MAC Addresses & IP Addresses
        • What is a Router?

    Data Representation

    Introduction
    Computers don’t understand Hindi, English, pictures or music directly.Inside, they only understand a simple language made of 1 and 0 — called binary. ...
    Why computers use binary (how binary represents data)
    Computers are built from tiny switches (transistors). Each switch has two states: ON → 1 OFF → 0 A series of 1s and 0s is called binary. Each 1 or ...
    Number system
    Text, Sound and Image
    Data storage and File compression
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