Big Idea 3 · Topic 3.6 · Exercise 1
Trace the Gate
25 minutes
Back to the Topic 3.6 lessonAll CSP topics
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The writing boxes below are yours. What you type stays in this browser, is saved here as you go, and is never sent to us or to your teacher. Hand the written work in the way your teacher asked for it.
The graded check at the bottom is the part that records to your teacher's gradebook.
Part B, from your handoutNot recorded
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Q1 · 3 points on the handout
Express the gate's decision WITHOUT any programming language - as a plain-language rule a new gate attendant could follow. Name the condition and state what happens for true and for false.
Q2 · 3 points on the handout
Write your own three-line IF-ELSE (in exam pseudocode) for a DIFFERENT gate - for example, an age check for a driving-simulator ride - and give one input that runs the IF branch and one that runs the ELSE branch. State what each displays.
Q3 · 2 points on the handout
ENRICHMENT: The gate could be written as a plain IF that displays 'Board the ride' on true and does nothing on false, OR as an IF-ELSE that also handles false. Explain which design is correct for a gate that must give EVERY rider feedback, and why the other would be a bug.
Q4 · 0 points on the handout
Next step: you traced these gates by hand. Now head to the Topic 3.6 page and type and run the harder versions - a single IF, an IF-ELSE, a computed condition, and one you build from scratch - where the computer checks your output for you.
No graded check on this page yetNot recorded
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Hand this in the way your teacher asked for it. Topic 1.1 has its graded check today, and the rest follow.