2009 AP CSA FRQ 2: StockpileCritter
Topic: GridWorld Case Study (Legacy)
Skills: Case study specific - Critter behavior modification
Unit: Unit 3 (Class Creation) (2025-2026 AP CSA)
Points: 9 | Time: ~22 minutes
Study Guide: Unit 2: Selection & Iteration
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 part of the AP CSA curriculum.
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Solution
// GridWorld Case Study - no longer tested
// Modern equivalent: Object state management and behavior modificationPart (b)
The GridWorld Case Study is no longer tested on the AP exam.
Solution
// Focus on standard class design problems instead.Key Concepts
✓ Object state tracking
✓ Behavior modification based on state
✓ Method overriding
Common Mistakes
✗ This question used the deprecated GridWorld Case Study
Official Resources
Author: Tanner Crow - AP CS Teacher, 11+ years