2014 AP CSA Free Response Questions | All Solutions & Scoring
2014 AP CSA Free Response Questions
Classic Exam (Pre-2019 Format): Pre-2019 classic format. Skip FRQ 2 entirely — it used the GridWorld case study, which was removed from the curriculum after 2014. FRQ 4 tested interface implementation (no longer tested). FRQ 1 and FRQ 3 are excellent current-exam prep.
Complete Java solutions, scoring rubrics, common mistakes, and exam tips for every 2014 AP CSA FRQ. All question text verified from the official College Board PDF.
The 2014 AP CSA FRQs
The 2014 exam used the classic multi-type FRQ format from before the 2019 standardization. These questions are excellent for building deep Java fundamentals even though some specific topics (such as interfaces with extends, GridWorld) no longer appear on the current exam.
Scrambler
Write scrambleWord() (swap each 'A' followed by non-'A' in a left-to-right pass, no position used twice) and scrambleOrRemove() (apply to an ArrayList, removing words unchanged after scrambling).
GameOfLife
(GridWorld-based) Implement neighbor-counting and generation-advancing logic for Conway's Game of Life in a 2D grid. Note: GridWorld was removed from the AP CSA curriculum after 2014.
SeatingChart
Write the SeatingChart constructor that fills a 2D array of Student objects from an ArrayList, row-by-row, then countAbsentInRow() to count absent students in a given row.
Trio
Implement the Trio interface in classes that hold three values, provide a getFirst/getSecond/getThird accessor set, and support a sameTrio() comparison across three Trio objects.
Quick Reference: All Four 2014 FRQs
| FRQ | Problem | Type | Difficulty | Key Skill |
|---|---|---|---|---|
| FRQ 1 | Scrambler | String | Medium | Skip-flag for used positions, ArrayList backward removal |
| FRQ 2 | GameOfLife | 2D Array | Medium-Hard | Neighbor count with bounds check, copy before update |
| FRQ 3 | SeatingChart | Class | Medium | Filling 2D array from ArrayList, row-by-row index math |
| FRQ 4 | Trio | Interface | Hard | Interface with three typed accessors, equality comparison logic |
How Hard Were the 2014 AP CSA FRQs?
Overall: moderate, with important caveats. The 2014 exam was the last to include GridWorld (FRQ 2), which should be skipped entirely for current exam prep. FRQ 1 (Scrambler) and FRQ 3 (SeatingChart) are highly applicable today. FRQ 4 (Trio) tested interface design, which is no longer on the current exam.
FRQ 1 (Scrambler) had a subtle skip-flag requirement that tripped up many students. FRQ 3 (SeatingChart) was a clean 2D array construction problem that is excellent practice for filling a grid from a list. FRQ 4 (Trio) required interface implementation with generic accessor patterns.
FRQ 1: Scrambler — Medium
scrambleWord() scanned left to right, swapping 'A' followed by non-'A', marking both positions as used. scrambleOrRemove() applied scrambleWord() to each ArrayList entry and removed unchanged words. Backward traversal was required for safe removal.
FRQ 2: GameOfLife — SKIP (GridWorld)
Used the GridWorld framework, which was removed from the curriculum after 2014. This question is not representative of any current exam content. The neighbor-counting and generation-advancing logic are interesting algorithmically but not worth studying for the current AP CSA exam.
FRQ 3: SeatingChart — Medium
Constructor filled a 2D Student array from an ArrayList, row-by-row. The index math (row * numCols + col) mapped 2D positions to 1D ArrayList indices. countAbsentInRow() traversed a single row and counted absent students. Very representative of current exam patterns.
FRQ 4: Trio — Hard
Interface with three typed accessor methods. Implementing classes had to override getFirst/getSecond/getThird. sameTrio() compared accessors across three Trio objects. Interface implementation is no longer tested, but the accessor pattern and cross-object comparison logic remain directly relevant.
Classic vs. Current Exam Format
Beginning with the 2019 exam, College Board standardized the AP CSA FRQ format to four consistent question types in the same order every year (Methods, Class Writing, ArrayList, 2D Array). The 2014 exam pre-dates this standardization, meaning question types varied more widely. Key differences from the current exam:
What Still Applies Today
All core Java skills are directly transferable: loops, conditionals, arrays, ArrayList, String methods, class design, 2D array traversal. The algorithmic patterns from 2014 appear on every modern exam.
What No Longer Appears
Interfaces with implements/extends, inheritance hierarchies, super() calls, and (in 2014) the GridWorld case study have all been removed from the AP CSA curriculum. Skip those parts when studying from this year.
How to Use This Page
For best results: attempt each FRQ yourself first (set a 22-minute timer), then check the solution page. Focus on the algorithmic core — loop patterns, array traversal, class structure — and skip any parts involving inheritance or interfaces, as these are no longer tested on current exams.
- Click any FRQ card above to open the full solution page (some solutions are still being built — check the official PDF linked above for full question text).
- Use the FRQs by Topic page to find more practice on any specific concept.
- See all years at the FRQ Archive.
Frequently Asked Questions About the 2014 AP CSA FRQs
What are the 2014 AP CSA FRQs?
FRQ 1 Scrambler (String manipulation), FRQ 2 GameOfLife (2D Array / GridWorld), FRQ 3 SeatingChart (Class + 2D Array), FRQ 4 Trio (Interface design). Each worth 9 points for 36 total, 50% of the exam score.
What is GridWorld and why does it appear in 2014 FRQ 2?
GridWorld was a required case study in AP CSA from 2008 to 2014. It provided a framework of Actor, Critter, and Grid classes that students had to understand for the exam. College Board removed GridWorld from the curriculum after 2014. FRQ 2 from 2014 should be skipped entirely when studying for the current exam.
Which 2014 FRQs are useful for current exam prep?
FRQ 1 Scrambler and FRQ 3 SeatingChart are both highly relevant today. String manipulation with char swapping and ArrayList removal (FRQ 1) and filling a 2D array from an ArrayList (FRQ 3) are core patterns on the current exam. FRQ 4 Trio used interfaces, which are no longer tested. Skip FRQ 2 (GridWorld) entirely.
What is the most common mistake on 2014 FRQ 1 Scrambler?
In scrambleWord(), forgetting the skip-flag that prevents a position already used in a swap from participating in another swap. Students who did not track used positions produced incorrect multi-swap outputs. In scrambleOrRemove(), iterating forward while removing from the ArrayList caused index drift.
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