Software Design
Choose data types and structures, read and create structured designs, show modular data flow and represent interfaces with wireframes.
How to study Higher Computing Science
Move from requirements to structured designs, trace code and data precisely, and support every test or evaluation judgement with observable evidence.
Core concepts
Concept 1
A design identifies data types and structures that match required values, relationships and operations.
Exam cue: Trace each requirement into a design step, structure or interface element.
Concept 2
Structure diagrams and pseudocode communicate top-level modules, refinements, logic and data flow before implementation.
Exam cue: Label data flow with the information passed, not vague arrows.
Concept 3
Functions and procedures should have clear responsibilities, inputs and outputs; wireframes describe interface input and output.
Exam cue: Refine top-level modules until each step is implementable and testable.
Risk pitfalls and guardrails
Writing language-specific code when a recognised design technique is requested.
Guardrail: Check route, scope, data type, boundary, loop condition, identifier and expected output before committing to the response.
Drawing modules without showing the data they exchange.
Guardrail: Check route, scope, data type, boundary, loop condition, identifier and expected output before committing to the response.
Choosing data structures from habit rather than required access and relationships.
Guardrail: Check route, scope, data type, boundary, loop condition, identifier and expected output before committing to the response.
Memory anchors
Top-level design
A high-level decomposition of the solution into named modules or steps.
Refinement
Break a high-level module into enough detail for implementation.
Data flow
Label the values entering and leaving each module.
Structure diagram
A hierarchy showing how a problem or solution is decomposed.
Pseudocode
A language-independent structured description of algorithm logic.
Wireframe
A low-detail representation of interface layout, inputs and outputs.
Checkpoint rule
Do the check-up only after you can summarize each concept in one sentence and identify one dangerous pitfall from memory.
Knowledge Check (after reading)
Short check-up to confirm understanding of this module.
Check-up Questions
A design is divided into inputOrder, calculateTotal and displayReceipt modules. Which design technique does this illustrate?
Why refine a module on a structure diagram before implementation?
Answer all questions to submit.
Next step personalized recommendations
Continue learning
Move forward only after this module is stable.
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