Review for the AP Computer Science Principles exam with this study guide (print & digital versions included). This study guide includes 100 practice questions with a complete answer key. Print it out or send to your students digitally — no prep required.

There are 20 questions on Data (binary conversion, bits and values, compression, metadata, PII, aggregation, algorithmic bias), 30 questions on Algorithms and Programming (pseudocode tracing, variables, conditionals, loops, procedures, lists, algorithm efficiency, undecidable problems), 18 questions on Networks and Cybersecurity (packet switching, DNS, TCP vs. UDP, HTTP/HTTPS, encryption, phishing, DDoS, 2FA, firewalls, IPv4 vs. IPv6, cloud computing), 16 questions on Impact of Computing (digital divide, beneficial/harmful effects, copyright and fair use, Creative Commons, algorithmic bias, accessibility, automation and employment), and16 questions on Create PT and mixed (pseudocode tracing, CPT requirements, iterative development, debugging, input/output, linear search complexity, computing innovation definition).

Every question has a full explanation. Binary conversion explanations show every step of the conversion process. Pseudocode tracing explanations execute the code line by line showing every variable value change. Algorithm efficiency explanations use concrete examples (doubling n quadruples O(n²) runtime). Cybersecurity explanations distinguish similar threats and defenses. Impact explanations acknowledge complexity — the same technology producing both benefits and harms is a recurring theme. Students who read every explanation will build the conceptual understanding the AP CSP exam rewards.