How to solve 2D array questions on AP CSA(Java)
2D array questions cause more bad scores on the AP CSA exam than anything else. This video teaches you how to solve 2-D array questions for AP CSA with a simple, 5-step process.
Specifically, we will solve free response question 4 (FRQ 4), once from the 2023 AP computer science A exam and once from the 2025 exam. FRQ 4 has the lowest average score every year out of all free response questions.
I go over how to read FRQs, how to identify common 2D array patterns, how to write Java code to solve 2-D array questions, and how to check your work so that you can get the score you want.
My name is John. I'm a private computer science tutor with a bachelor's degree in Computer Science from UT Austin as well as a master's degree in computer science. I'm also a certified teacher, and I love helping students score higher on CS exams and understand code at a deeper level.
If you're interested, you can contact me on my website:
https://www.codeslatetutoring.com/fro...
Link to official past AP exams:
https://apcentral.collegeboard.org/co...
00:00 Introduction
00:32 The 5 Steps
01:04 2025 FRQ 4 Step 1
03:08 Step 2
06:23 Step 3
08:28 Step 4
12:47 Step 5
15:43 2023 FRQ 4 Step 1
18:13 Step 2
21:14 Step 3
22:10 Step 4
27:33 Step 5