Machines and computational modelling

Worked examples (9)

• 1One input, one process, one output
• 2Received or calculated?
• 3A microwave oven, stage by stage
• 4The 'unexpected item' check
• 5A device on both sides of the model
• 6Describing the processing of a weather station
• 7A washing machine, with sensors, actuators and feedback
• 8Where one system ends and the next begins
• 9Should storage be shown as a fourth stage?

Model answers (9)

• ✓Model answer — Paper 1 style — AO1
• ✓Model answer — Paper 1 style — AO1
• ✓Model answer — Paper 1 style — AO1
• ✓Model answer — Paper 1 style — AO2
• ✓Model answer — Paper 1 style — AO2
• ✓Model answer — Paper 1 style — AO2
• ✓Model answer — Paper 1 style — AO3
• ✓Model answer — Paper 1 style — AO3
• ✓Model answer — Paper 1 style — AO3

Worked examples (9)

• 1Naming the three models
• 2Which model is being described?
• 3Why sequential code is easier to debug
• 4Working out the real speedup
• 5A task that four cores cannot help
• 6A traffic jam nobody programmed
• 7Does multitasking mean parallel?
• 8Why more cores stop helping
• 9Choosing a model, and justifying it

Model answers (9)

• ✓Model answer — Paper 1 style — AO1
• ✓Model answer — Paper 1 style — AO1
• ✓Model answer — Paper 1 style — AO1
• ✓Model answer — Paper 1 style — AO2
• ✓Model answer — Paper 1 style — AO2
• ✓Model answer — Paper 1 style — AO2
• ✓Model answer — Paper 1 style — AO3
• ✓Model answer — Paper 1 style — AO3
• ✓Model answer — Paper 1 style — AO3