AP Computer Science Principles (CSP) Exam Survival Guide

Must-do topics

• Computing Basics: binary/hex, data compression, representation of images/text/sound.
• Programming Fundamentals: variables, loops, conditionals, functions, lists.
• Algorithms: efficiency, sequencing, iteration, selection.
• Data & Internet: big data, metadata, cybersecurity, internet protocols (IP, DNS, TCP/IP).
• Impacts of Computing: ethics, digital divide, innovations, privacy.
• Performance Task: Create Task (program with inputs/outputs, algorithm, abstraction).

Top traps

• Confusing abstraction levels (bit, byte, pixel).
• Forgetting that lossless vs lossy compression differ.
• Using a “function” that doesn’t reduce repetition.
• Misunderstanding IP vs DNS roles.
• Ethics questions: missing nuance (not all-or-nothing).

Quick checks

• Convert binary 101101 → decimal.
• Example of lossy compression (JPEG, MP3).
• Write pseudocode: average numbers in a list.
• Which role: DNS or IP?
• Name 1 positive + 1 negative impact of AI.

You will make

• Binary/Hex Conversion Chart.
• Pseudocode Flowchart (algorithm design).
• Create Task Project (mini-app with input/output).
• Cybersecurity Poster (phishing, encryption basics).

Last-48 Hours Checklist — AP CSP

• Review binary conversions (decimal ↔ binary ↔ hex) with 5 practice problems.
• Recall lossless vs lossy compression with 2 real examples each.
• Rehearse pseudocode for lists & loops (trace 2 problems).
• Summarize internet flow: device → DNS → IP → TCP/IP (draw it once).
• Jot 2 ethical pros/cons of tech innovations (AI, social media, data mining).
• Walk through your Create Task project:
  • Inputs/outputs clear?
  • At least 1 algorithm with sequencing/selection/iteration?
  • Abstraction (function/module) used?