2012 AP CS A Exam Free Response Solutions

The 2012 AP Computer Science A Free Response problems are of slightly above average difficulty.

The ClimbingClub question is formatted unusually. Two different implementations of the addClimb are requested with different requirements. The second implentation is trivial if the standard algorithm is known; otherwise, it can be challenging to implement perfectly. The question also features a runtime analysis, which is unusual on the AP CS A Free Response section.

RetroBug requires a simple extension of the Bug class.

The HorseBarn method consolidate, like addClimb benefits enormously from knowledge of the standard algorithm to perform the task.

The GrayImage question requires simple traversals of a 2D array.