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Data-flow diagrams

How to use this clinic

This clinic brings together authentic QCAA external-assessment questions about data-flow diagrams and exchange-system relationships.

  1. Attempt each question on paper without looking ahead.
  2. Compare your answer with the worked response and explanation.
  3. Use the complete QCAA sample response and marking criteria to check what earned the marks.
  4. Add anything missing to your answer in a different-coloured pen.

The complete printable clinic will be available below.

It includes five QCAA questions from 2021–2025, worked responses, explanations and complete marking-guide extracts.