OCR H446 · Component 02

2.1.4 Thinking logically

Recognise decisions, build Boolean conditions and follow the paths they create.

Topic overview

Build accurate recall, then apply it.

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Set label = 'low'. Run IF n >= 10 THEN label = 'medium'; then a separate IF n >= 20 THEN label = 'high'. What is label for n = 24, and why?Trace
Where is a decision needed before removing an item from a queue?Apply
A discount requires a valid ticket and age below 18. Which logical connective joins the tests?Logic
How does IF / ELSE affect program flow?Flow
How do two independent IF statements differ from IF / ELSE IF?Compare
Entry is permitted from age 16. Why is age > 16 an incorrect test?Debug

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