O/L ICT Lesson 3: Data Representation (දත්ත නිරූපණය)

Units: Bit (0 or 1), Byte (8 bits).
Multipliers: Kilobyte (KB) = $1024 \text{ B}$ ($2^{10}$ B), Megabyte (MB) = $1024 \text{ KB}$ ($2^{10}$ KB), Gigabyte (GB) = $1024 \text{ MB}$ ($2^{10}$ MB), Terabyte (TB) = $1024 \text{ GB}$ ($2^{10}$ GB).
Capacity Order: Cache (smallest) $\to$ RAM $\to$ Hard Disk (largest).

O/L ICT Lesson 03: Data Representation Methods in the Computer System

Bilingual, exam-focused notes for Unit 03 of the Sri Lankan GCE Ordinary Level ICT syllabus (Grade 10). Covers binary/octal/hexadecimal number systems, binary arithmetic, data storage capacities, and character encoding standards (ASCII/Unicode). Includes interactive conversion simulators, structured O/L essay questions with model answers, strictly four-option MCQs with explanations, global video resources, and bilingual flashcards.