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Course Content
Chapter 1: Information Representation
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Lesson-1.1.1: Introduction to Binary Systems – Why Computers Use Binary and the Need for Different Number Bases
Lesson-1.1.2: Exploring the Denary, Binary, and Hexadecimal Number Systems – Base Concepts and Everyday Use
Lesson-1.1.3: Binary Coded Decimal (BCD) – What It Is, Why It Matters, and How It’s Used in Real Applications
Lesson-1.1.4: How to Convert Between Denary, Binary, Hexadecimal, and BCD – Step-by-Step Methods with Practice Problems
Lesson-1.1.5: Performing Binary Arithmetic – Adding and Subtracting Unsigned and Signed Binary Numbers
Lesson-1.1.6: Understanding and Identifying Overflow Errors in Binary Arithmetic – How They Occur and Why They Matter
Lesson-1.1.7: Real-World Applications of Binary Coded Decimal and Hexadecimal in Computing Systems
Lesson-1.2.1: Representing Text in Binary – Understanding ASCII, Extended ASCII, and Unicode Encoding Standards
Lesson-1.2.2: Introduction to Bitmap Images – Defining Pixels, Image Resolution, Colour Depth, and File Headers
Lesson-1.2.3: Calculating Bitmap File Sizes – Applying Image Dimensions and Colour Depth in Storage Estimation
Lesson-1.2.4: Vector Graphics Internals – What are Drawing Objects, Properties, and How Vector Images are Stored
Lesson-1.2.5: Bitmap vs Vector Graphics – Comparing Structure, Scalability, and Ideal Use Scenarios in Real Life
Lesson-1.2.6: Representing Sound in Binary – Understanding Sampling, Bit Depth, and the Process of Analogue-to-Digital Conversion
Lesson-1.2.7: Analysing the Effects of Sampling Rate and Sampling Resolution – Impact on File Size and Sound Quality
Lesson-1.3.1: Why Compression is Necessary – Reducing Storage and Transmission Requirements in Modern Computing
Lesson-1.3.2: Understanding Lossy Compression – How JPEG and MP3 Work, and When to Use Lossy Formats
Lesson-1.3.3: Understanding Lossless Compression – In-depth Look at Run-Length Encoding and Huffman Coding
Lesson-1.3.4: Choosing Between Lossy and Lossless Compression – Comparing Efficiency, Quality, and Application Contexts
Lesson-1.3.5: How Different File Types Are Compressed – Techniques for Text, Bitmap Images, Vector Graphics, and Sound
Cambridge International AS & A Level Computer Science (9618)
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