2012 AP CSA FRQ 4: RetroBug - Solution

2012 AP CSA FRQ 4: RetroBug

Topic: GridWorld Case Study (Legacy)

Skills: Case study specific - Bug behavior modification

Unit: Unit 3 (Class Creation) (2025-2026 AP CSA)

Points: 9 | Time: ~22 minutes

Note: This FRQ used the GridWorld/Marine Biology Case Study (no longer tested).

Part (a)

Note: This FRQ was part of the GridWorld Case Study which is no longer tested.

Try First! Attempt before viewing solution.

Solution

// GridWorld Case Study - no longer tested

Part (b)

The GridWorld Case Study is no longer tested.

Solution

// Focus on standard class design problems.

Key Concepts

✓ State tracking
✓ Behavior reversal

Common Mistakes

✗ This question used the deprecated GridWorld Case Study
Practice Similar: 2019 FRQ 4 | 2022 FRQ 4 | 2023 FRQ 4

Official Resources

Author: Tanner Crow - AP CS Teacher, 11+ years

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