AP Computer Science Principles is organized around 5 Big Ideas that span both the multiple-choice exam and the Create Performance Task. Unlike AP CSA, which tests Java programming, AP CSP uses a visual pseudocode language and focuses on computing concepts: how data is represented, how algorithms work, how the internet is built, and how computing affects society. It is one of the more approachable AP exams, but students who underestimate the Algorithms and Programming content often struggle on exam day.

How the AP CSP Exam Is Organized

The AP CSP exam has 70 multiple-choice questions covering all 5 Big Ideas. Big Idea 3 (Algorithms and Programming) is the largest section and includes questions where you must read and trace pseudocode programs. The Create Performance Task is a separate programming project you complete during the school year and submit for College Board scoring—it counts as 30% of your final score. Strong AP CSP students prepare for both the exam and the task throughout the year.

Which Big Idea Is Most Important?

Big Idea 3 is consistently the most heavily tested on the multiple-choice section, covering variables, conditionals, loops, lists, procedures, and search algorithms. Big Idea 2 (Data) and Big Idea 5 (Impact of Computing) also appear frequently, especially in multi-part scenario questions. Big Ideas 1 and 4 are smaller but still appear on every exam, often in questions that connect technical concepts to real-world applications.

How to Use These Study Guides

If you are preparing for the exam, start with Big Idea 3 since it has the most multiple-choice questions. Then work through Big Ideas 2 and 5, which test vocabulary-heavy content where flashcards and repeated exposure help most. Use the Create Task guide as a separate resource alongside the Big Idea 1 content. Daily practice questions are the fastest way to build fluency across all five areas.