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0478 Unit 1: Data representation

Paper 1: Computer systems

 
1

Inside the Unit...

Download Free Sample 5.8mb

Areas Covered

  • Lesson 1: Binary systems
  • Lesson 2: Hexadecimal
  • Lesson 3: Binary shifts and two's complement
  • Lesson 4: ASCII and Unicode
  • Lesson 5: Sound
  • Lesson 6: Images
  • Download sample lesson above
  • Lesson 7: Data storage and compression
  • Assessment

There are 7 worksheets, 7 homework tasks, and an assessment test, each with answers included in this unit.

Summary - New 2023-2025 Exam Specification

This unit is subdivided into seven learning hours plus an end-of-unit assessment. It is a theoretical unit covering the latest Cambridge IGCSE 0478 / 0984 and O level 2210 Computer Science specifications.

Binary systems and hexadecimal systems are covered along with conversions with denary numbers. Binary additions and overflow errors are also considered along with logical binary shifts and two’s complement representations.

The second half of the unit covers text, sound and images. ASCII and Unicode are considered as character sets. Sound sampling and the effects of sample rate and resolution are covered. For images, the concepts of resolution, colour depth and the effects these on file size and resolution are all considered. The necessary units of data storage along with file size calculations and compression are also covered in the second half of the unit.

At the end of the unit an assessment test is given comprising questions similar to those found on the IGCSE exam paper.

What's included in the toolkit?

Toolkit

These units have been written to satisfy the specification for the theoretical Section 1 of the Cambridge IGCSE® 0478, 0984 and O Level 2210 Computer Science courses. Each unit contains:

  • PowerPoint slides for each lesson
  • Detailed lesson plans
  • Learning objectives and outcomes
  • Worksheets and homework activities with answers
  • End-of-unit Assessment test with answers
  • Other material and links to online resources

What people say...

Fantastic resources! An excellent time saving strategy for lesson preparation and marking. Concepts are comprehensive and structured appropriately for pupils and teachers.

Neferti Rolluqui. Head of Computer Science, Dhahran British Grammar School, Saudi Arabia

Can I just say how pleased I was with the book. I’m thinking of using it rather than a text book! Brilliant in that there is no waffle and just facts – excellent for when a pupil misses a lesson.

 

Jonathan Morton. Head of Computer Science, Cheltenham College

Relevant Textbooks

Inside the Unit...

  • Download Free Sample 5.8mb

    Areas Covered

    • Lesson 1: Binary systems
    • Lesson 2: Hexadecimal
    • Lesson 3: Binary shifts and two's complement
    • Lesson 4: ASCII and Unicode
    • Lesson 5: Sound
    • Lesson 6: Images
    • Download sample lesson above
    • Lesson 7: Data storage and compression
    • Assessment

    There are 7 worksheets, 7 homework tasks, and an assessment test, each with answers included in this unit.

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