T2 Short Reviewer
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Questions and Answers

Match the following types of events with their descriptions:

User-initiated event = Triggered by user actions like clicking or touching Sensor event = Based on the phone's orientation or location Automatic event = Occurs due to internal game mechanics like sprite collisions Timer event = Triggered at regular intervals by a clock

Match the programming data types with their definitions:

Number = Numeric data suitable for mathematical operations String = Alphanumeric data used for text manipulation Boolean = Data type representing true or false values Variable = Storage for data values that can change during execution

Match the following event components with their properties:

On_Start = Initial setup or launch event On_Break = Event triggered when breaking occurs On_Park = Event associated with stopping or parking Brand = Property indicating the manufacturer's name

Match the following command blocks with their functions:

<p>Button Click = Initiates action when the button is pressed Open Another Screen = Allows navigation to different screens Call Web Viewer = Commands to fetch a URL Text String = Block where URL or text can be entered</p> Signup and view all the answers

Match the following arithmetic operators with their symbols:

<p>Addition = + Subtraction = - Multiplication = x Division = /</p> Signup and view all the answers

Match the following variable naming rules with their descriptions:

<p>First character rule = Cannot start with a number Special character rule = Special characters are not allowed Whitespace rule = Spaces turn into underscores Identifier rule = Names must be unique and recognizable</p> Signup and view all the answers

Match the components of the web viewer app with their functions:

<p>Web viewer = Displays online material and updates Events handler block = Defines app response to various events TimerInterval attribute = Used in clock and sprite components for intervals Collection of websites = Organizes preferred themes or categories</p> Signup and view all the answers

Match the following component properties with their corresponding events:

<p>Color = Visual attribute that can change in response to events Model = Characteristics specifying the physical representation Brand = Manufacturer details linked with the component On_Park = Indicates when the application stops action</p> Signup and view all the answers

Flashcards

String

A data type that represents a sequence of characters, like words or phrases.

Boolean

A data type that can only be one of two values: 'true' or 'false'.

Number

A data type that represents a numerical value, like 1, 2, 3, or 3.14.

User-initiated event

An event that occurs when a user interacts with an app, such as clicking a button or moving the screen.

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Operator

A special symbol in programming that performs an operation on data, like adding, subtracting, or comparing.

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Automatic event

An event that happens automatically, without user interaction, like a timer ticking.

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Variable

A container for storing different types of data, where the value can be changed while the code is running.

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Event handler block

A block of code that specifies how an app reacts to a specific event, such as displaying a message or navigating to another screen.

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Capital of France (example flashcard)

Paris

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Study Notes

Web Viewer App

  • A collection of websites categorized by theme or subject.
  • Displays online content instantly, useful for tracking events.
  • Ideal for apps needing frequent updates (e.g., events, properties).

Event Handler Block

  • Defines how the app reacts to specific events.
  • Events can occur before, during, or after an action.
  • Types:
    • User-initiated: Button clicks, screen touches/moves, tilting phone.
    • Sensor events: Phone movement triggers sensor events (orientation, accelerometer, location).
    • Automated: Collisions between sprites or with canvas edges, or timer intervals.
    • Timer events: Triggered when a timer interval expires.

Properties

  • Attributes describing a component.

  • Each component has unique properties.

  • Example properties:

    • On_Start, Brand
    • On_Break, Model
    • On_Park, Color

Button Click Event Block

  • Executes code upon button clicks.
  • Example action: Open another screen.

Open Another Screen Command Block

  • Navigates to another screen within the app.
  • Uses a screen name to identify the target screen.

Call Web Viewer Command Block

  • Retrieves content from a specified URL.
  • Accepts a text string (URL) as input.

Data Types

  • Numbers: Used in mathematical operations and calculations.
  • Strings: Used for text manipulation and handling alphanumeric data.
  • Booleans: Represent true/false values, essential for logical operations.

Data Manipulation Examples

  • Numbers: Performing mathematical equations within math blocks.
  • Strings: Manipulating text (e.g., converting uppercase to lowercase, concatenating).
  • Booleans: Creating logical sequences in code that require a decision to be made.

Variables

  • Store various data types.
  • Values can change during execution.
  • Correct naming:
    • Start with a letter or underscore, avoid special characters or spaces.

Arithmetic Operators

  • Symbols (+,-,*,/,%) for performing mathematical calculations.
  • Enhance app functionality through numerical manipulation.

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