AP Computer Science Principles Unit Tests

Pick a unit to drill it head-on. Each unit has 4 different test variations so you can keep retaking until you master it.

10–13% of exam

Collaboration, program function & purpose, design, and program development.

5 questions · ~8 minsmall bank — variations may overlap

Pick a variation

17–22% of exam

Binary, data abstraction, data compression, and information extraction.

10 questions · ~15 minsmall bank — variations may overlap

Pick a variation

30–35% of exam

Variables, data abstraction, algorithms, simulations, and procedures.

12 questions · ~18 minsmall bank — variations may overlap

Pick a variation

11–15% of exam

Internet, fault tolerance, parallel & distributed computing.

10 questions · ~15 minsmall bank — variations may overlap

Pick a variation

21–26% of exam

Beneficial and harmful effects, digital divide, computing bias, and security.

10 questions · ~15 minsmall bank — variations may overlap

Pick a variation

How unit tests work

Focused on a single AP unit, between a single-topic quiz and the full diagnostic.
4 variations per unit — pick a fresh variation any time you retake.
Roughly 90 seconds per question — the same pacing as the AP exam.
You'll get a unit-level score, recommended topics to review, and a question-by-question explanation.

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