O level / IGCSE Data Representation
OLevel
Last updated 7/14/2025
5 hours to complete.
9 Modules in course.
5(1)

Instructor:
Muhammad Yousuf
Course Description
In this course, you’ll learn to:
✅ Understand how data is represented inside a computer (binary, denary, hexadecimal)
✅ Convert between binary, denary, and hexadecimal numbers
✅ Explain the use of character sets (ASCII and Unicode)
✅ Understand how images and sound are stored digitally
✅ Calculate file sizes for text, images, and sound
✅ Solve exam-style questions and past paper problems.
Course Content
Negative Denary number
2's Complement
Binary Addition & Overflow
Binary Subtraction
Text & Sound
Sound File Size
Image with File Size Calculation
File Compression and RLE with Text
RLE with Images
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