Help your students master one of the trickiest topics on the AP CS A exam — 2D arrays. This worksheet covers everything from basic row and column access to matrix operations, diagonal traversal, and the transpose algorithm.

⭐ WHAT'S INCLUDED:

• 20 code tracing exercises across 4 sections
• Section A — Declaration, Access & Nested Loops
• Section B — Filling, Max, Row & Column Sums
• Section C — Diagonals & Traversal Patterns
• Section D — Matrix Operations & AP Challenges
• Full answer key with explanations — teacher use only

⭐ SKILLS COVERED:

• Declaring and accessing 2D arrays with grid[row][col]
• grid.length vs grid[0].length
• Nested for loops and enhanced for loops
• Row sums and column sums
• Finding maximum in a 2D array
• Main diagonal and anti-diagonal
• Matrix addition
• Transposing a matrix
• Symmetry check

⭐ PERFECT FOR:

• AP CS A Unit 8 practice
• FRQ preparation
• Bell ringers and warm-up activities
• Test and quiz review
• Sub plans

⭐ DETAILS:

• Grade level: 9–12
• Time: 40–60 minutes
• Format: Printable PDF — works digitally too
• Language: Java
• Answer key included on a separate page

This is Pack 8 of the AP CS A Code Tracing Series. Collect all 10 packs or grab the complete bundle!