📝 Unit Tests

AP Computer Science A 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.

2.5–5% of exam

Unit 1: Primitive Types

Variables, primitive data types, expressions, and casting.

5 questions · ~8 minsmall bank — variations may overlap

Pick a variation

5–7.5% of exam

Unit 2: Using Objects

Object instantiation, methods, the String class, and the Math class.

5 questions · ~8 minsmall bank — variations may overlap

Pick a variation

15–17.5% of exam

Unit 3: Boolean Expressions & If Statements

Boolean logic, if/else, equivalent boolean expressions, and short-circuit eval.

4 questions · ~6 minsmall bank — variations may overlap

Pick a variation

17.5–22.5% of exam

Unit 4: Iteration

while loops, for loops, nested loops, and informal runtime analysis.

4 questions · ~6 minsmall bank — variations may overlap

Pick a variation

5–7.5% of exam

Unit 5: Writing Classes

Constructors, encapsulation, accessor/mutator methods, and scope.

5 questions · ~8 minsmall bank — variations may overlap

Pick a variation

10–15% of exam

Unit 6: Array

Array creation, traversal, and common algorithms.

4 questions · ~6 minsmall bank — variations may overlap

Pick a variation

2.5–7.5% of exam

Unit 7: ArrayList

ArrayList methods, traversal, and standard algorithms.

4 questions · ~6 minsmall bank — variations may overlap

Pick a variation

7.5–10% of exam

Unit 8: 2D Array

2D array traversal, row-major / column-major ordering, and algorithms.

4 questions · ~6 minsmall bank — variations may overlap

Pick a variation

5–10% of exam

Unit 9: Inheritance

Subclasses, super, polymorphism, Object methods, and overriding.

6 questions · ~9 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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