AP CSP 1.2 | Purpose, Inputs, Outputs, Events & Prior State Explained

These lessons stand on their own. Want extra practice? 📘 My AP CSP study guide (more practice questions, all explained): https://www.amazon.com/dp/B0HN67PZWG?tag=kevinwellborn-20 🌐 More practice & resources: https://cyberteaches.com ▶️ Full AP CSP course, in order: https://www.youtube.com/playlist?list=PLQGjMvGO2D8s05VBtoa90aUgXZwmwpkzq Unit 1, Lesson 2: Program Function and Purpose How programs take things in and send things out, with animations: purpose vs function, programs, code segments and behavior, the four kinds of input, events and event-driven programming, outputs and prior state (same input, different output), input or output for which program, the flashcard app worked example, the real Mars Climate Orbiter loss (1999), a smart garden evidence set, and 3 exam questions from the book. ⏱️ Chapters 0:00 This lesson in the book 0:13 This lesson in one picture 0:24 Picture this 0:48 Key words 0:55 How purpose shapes a program 1:40 How a program behaves 2:12 How inputs and events work 3:01 How outputs and prior state work 3:52 How to spot inputs and outputs 4:17 Match the clue to the idea 4:28 A short skit: the tap 4:40 Worked example: the flashcard app 5:23 Real story: the Mars Climate Orbiter, 1999 5:52 Analyze the evidence: the smart garden 6:19 Exam question 1: is the prompt output? 7:10 Exam question 2: taps and timers 7:49 Exam question 3: the undo key 8:38 Recap + practice Real case sources: NASA, Mars Climate Orbiter Mishap Investigation Board Phase I Report (November 10, 1999). AP® is a trademark registered by the College Board, which is not affiliated with, and does not endorse, this content. Credits Animations and diagrams drawn by CyberTeaches from the AP CSP Study Guide. Pictures: photorealistic illustrations made for this video. Icons: Twemoji, CC BY 4.0. Laugh sound: Freesound #397034 (felix.blume), CC0. #APCSP #ComputerScience #APExam As an Amazon Associate I earn from qualifying purchases.