ap csp chapter 3 test

inputs

• typing

• clicking buttons

these actions give the app info to process

output

examples

• water filling on the screen

• when the app switches to a different screen

UI (user interface)

it refers to the part of a program or app that users interact with directly.

• It’s everything the user sees and uses to interact with the program: buttons, text boxes, images, sliders, menus, and etc.

an app’s purpose is…

what it does, who its users might be, what advantages it might offer, and how it might be improved upon

UI events

can be things like mouse clicks or keyboard entries that trigger actions in an event driven program

an app’s functionality

what an app does with input data

• how it responds to a user’s inputs

• an app’s Functionality is how the app processes and user’s input, and what the app does with that data

Example: A calculator app takes numbers (input), adds them (functionality), and shows the sum (output).

negative design decisions

choices in your program or app that make it harder for users to interact with it or use it correctly

sequential programming

when an app runs its code one after another, in order, without needing interaction

event driven programming

when an app functions only when a user interacts with the app through actions or inputs

sample code

a small piece of code from your program that shows how it works.

documentation (not in the code, external)

written explanations that describe how your program works

comments //(in the code)

//A note written inside the code that explains what the code does

debugging

The process of finding and fixing errors (bugs) in a program so it works correctly

pair programming

when 2 people share a computer to code

program statement

A single instruction in a program that tells the computer to do something

• Each line of code in an app is a program statement that the computer executes in order (sequentially unless otherwise directed)

program

A set of instructions that tells a computer what to do. ✅

• It can take inputs, process data, and produce outputs (kinda like machines, but

  • A machine is the physical hardware (computer, phone, robot, etc.) that runs the program.

development process

the series of steps used to plan, create, test, and refine a program or app.

event

• Event: An action the user takes that triggers the program (like physically typing)

• Input: The data the program receives from the user, often during the event.