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AP Computer Science Principles

Practice quizzes, exams, and worksheets with answer keys, organized by unit. Every answer key includes per-question explanations so students can learn from their mistakes.

7 practice quizzes 3 practice exams 6 worksheets Units 1–3
Unit 1 - Digital Information

Practice Quizzes

Binary Numbers
Practice Quiz ↓ Key + explanations ↓
Vocabulary
Practice Quiz ↓ Key + explanations ↓
Digital Information Progress Check
Practice Quiz ↓ Key + explanations ↓

Practice Exams

Unit 1 Practice Exam: Digital Information
Practice Exam ↓ Key + explanations ↓

Worksheets

Binary Numbers & Number Systems
Worksheet ↓ Answer Key ↓
Representing & Compressing Data
Worksheet ↓ Answer Key ↓
Unit 2 - The Internet

Practice Quizzes

Vocabulary
Practice Quiz ↓ Key + explanations ↓
The Internet Progress Check
Practice Quiz ↓ Key + explanations ↓

Practice Exams

Unit 2 Practice Exam: The Internet
Practice Exam ↓ Key + explanations ↓

Worksheets

Networks & Addressing
Worksheet ↓ Answer Key ↓
Packets & Fault Tolerance
Worksheet ↓ Answer Key ↓
Unit 3 - Apps & Program Design

Practice Quizzes

Vocabulary
Practice Quiz ↓ Key + explanations ↓
Apps & Program Design Progress Check
Practice Quiz ↓ Key + explanations ↓

Practice Exams

Unit 3 Practice Exam: Apps & Program Design
Practice Exam ↓ Key + explanations ↓

Worksheets

Apps, Inputs & Design
Worksheet ↓ Answer Key ↓
Event-Driven Programming & Debugging
Worksheet ↓ Answer Key ↓
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