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Cambridge Year 9 Checkpoint · Revision notes

Computing revision notes

Topic by topic notes, worked examples and practice questions for every topic in the Cambridge Lower Secondary Stage 9 Computing syllabus.

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Computational Thinking

  1. 1.Designing solutionsDecomposition and abstraction, Inputs and outputs, Pseudocode and flowcharts, Combining constructs
  2. 2.Tracing and comparing algorithmsTrace tables, Linear search, Bubble sort, Evaluating solutions

Programming

  1. 1.Control and reusable codeData types and operators, Nested selection and loops, Procedures and functions, Parameters and return values
  2. 2.Lists and text processingOne-dimensional collections, Indexing and traversal, String operations, Totals and searches
  3. 3.Testing and physical computingTest plans and test data, Debugging and refinement, Sensors and actuators, Communication between devices

Managing Data

  1. 1.Relational databasesTables and data types, Primary and foreign keys, Relationships, Queries and validation
  2. 2.Spreadsheet modelsFormulas and functions, Relative and absolute references, What-if modelling, Charts and model limits
  3. 3.Big data and responsible analysisVolume variety and velocity, Patterns and visualisation, Data quality and bias, Privacy and responsible use

Networks and Digital Communication

  1. 1.Network designLANs and WANs, Star and mesh topologies, Network hardware, Wired and wireless links
  2. 2.Communication and securityPackets and protocols, Addressing and web requests, Network threats, Protecting transmissions

Computer Systems

  1. 1.Inside the processorCPU components and registers, Fetch-decode-execute cycle, Memory and storage, Factors affecting performance
  2. 2.Binary data representationBinary and denary conversion, Bits bytes and file sizes, Text encoding, Images and sound
  3. 3.Software and automated systemsSystem and application software, Operating system services, Embedded and control systems, Impacts and responsible design

These are Bright Minds revision notes and practice questions in Cambridge style, not official Cambridge International materials. Always check the syllabus year with your school.