New: free AP study guides for all 19 courses - read Unit 1 of every course, no account needed.
AP Computer Science A · 4 units · 53 topics

Score a 5 on AP Computer Science A.

Four units covering Java objects and methods, selection and iteration, class design, and data collections. Every topic includes an interactive, execution-verified code trace and an explanation of the state changes that matter.

Read Unit 1 free →Start free practice set
30,000+ AP students Score guarantee
Study notes

Every AP Computer Science A unit, explained.

Unit 1 is free to read in full. Every other unit shows its first topic free; a 7-day trial opens the rest.

  1. Unit 1Using Objects and Methods15–25% of the exam · 15 topicsFreeRead unit
  2. Unit 2Selection and Iteration25–35% of the exam · 12 topicsPreviewPreview
  3. Unit 3Class Creation10–18% of the exam · 9 topicsPreviewPreview
  4. Unit 4Data Collections30–40% of the exam · 17 topicsPreviewPreview
Free practice

Try 16 AP Computer Science A questions in the real test engine.

  • 16 multiple-choice questions from our full-length tests
  • 35 minutes, the real exam's pace
  • Same engine as our full-length tests, then every answer explained
Start the free practice set →

Or try two questions right here:

AP Computer Science A · Sample questions

Consider the following code segment.

String result = "";
for (int i = 1; i <= 5; i++)
{
  result += i;
}
System.out.println(result);

1

Which of the following best describes the behavior of the code segment?
FAQ

AP Computer Science A questions, answered.

What's on the AP Computer Science A Exam?
The AP Computer Science A Exam is 3h long: Multiple choice (42 questions, 90 minutes, 55% of the score) and Free response (4 questions, 90 minutes, 45% of the score). These figures come from College Board's AP Computer Science A exam page.
Are these AP Computer Science A notes free?
Unit 1 is free to read in full, and every other unit shows its first topic free. A free 7-day trial opens all 4 units and the full-length practice tests.
How many units are in AP Computer Science A?
AP Computer Science A has 4 units: Unit 1, Using Objects and Methods (15–25% of the exam); Unit 2, Selection and Iteration (25–35% of the exam); Unit 3, Class Creation (10–18% of the exam); Unit 4, Data Collections (30–40% of the exam).
When is the AP Computer Science A Exam?
AP Exams are held over two weeks every May. College Board publishes the schedule for each year; the AP exam calendar lists the dates once they are announced.
How is the AP Computer Science A Exam scored?
AP Exams are scored from 1 to 5. The AP Computer Science A score calculator estimates your score from your results on each section.

Ready for a 5? Start free today.

7 days free — $0.00 due today. Every AP Computer Science A unit and full-length test, plus 18 more AP subjects.

Start my free 7 days →

Then $15/mo on annual · cancel anytime · score guarantee