Comp Sci Test Study Flashcards
What is an app’s component?
The visible and non-visible pieces that make an app work. They are built in.
What is an app’s behavior?
The events and responses to those events.
What are the 5 types of events in app inventor?
User- initiated event, Initialization event, Timer event, Animation event, and External event.
What is a user-initiated event?
An event that is triggered by the user.
What is an initialization event?
An event that is triggered when the app is launched.
What is the event handler block in MIT app inventor?
Block that tells the app what to do in case of a specific event.
What is a timer event?
An event that is triggered by a timer or time passing.
What is an animation event?
An event that is triggered by things on the screen, such as sprites colliding.
Define and provide examples for an event handler
This is made up of the event and the app’s response to that event. For example, when the user clicks a button, it plays a sound.
Define a visible component.
These are parts of the user interface, components that the user can see.
What is an external event?
An event triggered by an external device.
Define non-visible components.
Components that the user cannot see.
How does an event handler start in app inventor?
It begins with a “when do” block.
What is an algorithm?
A sequence of precise instructions that solve a problem or perform some computation.
What is sequence in an algorithm?
It is following a precise sequence (order) of actions or instructions.
What is repetition in an algorithm?
It allows algorithms to be simplified by stating that certain steps will repeat until told otherwise.
Provide examples of a visible component.
Buttons, boxes, labels, text, etc.
What is selection in an algorithm?
An algorithm being able to go down different pathways depending on what happens (if/else).
Provide examples of a non-visible component.
Accelerometer, clock, location sensor, sound, etc.
Define a property in MIT app inventor.
A property is something you can change about a visible component. You can modify it in the designer view in App Inventor.
What does SMS stand for?
SMS stands for short message service.
What is an algorithm in computer programming?
Programs are algorithms written in a programming language to run on the computer.
What is an IDE?
It allows programmers to edit source code, compile and run the code, and easy debugging.
Define event-driven programming.
Event-driven programming is when the program reacts to events, mostly triggered by the user.
What are the three types of algorithms?
Sequence, Repetition, and Selection
Give examples of a property in App Inventor.
Height, width, or color.
What is SMS?
It does not include any type of media and basically is text messaging.
What type of event would an SMS be?
If sending, user-initiated, if receiving, external.
What does IDE stand for?
Integrated Development Environment
Why are IDE’s important for software and application development?
They are important because they allow developers to create the app easily, and newer programmers to have that opportunity as well.
How is event-driven programming different than traditional programming?
Different from traditional programming because it does not perform recipes in a predetermined order (do A, then do B, then do C) like traditional programming. Everything the app performs is based on what events happen.
What is a recipe in computer programming?
A recipe is a sequence of actions to be performed.
What is the viewer panel in app inventor?
Inside design view, shows what the final app will look like to users when they open it.
What is a function?
Something that does something to or with a component
What is the User Interface?
Generally the visual components of the app, but is the part of the app that the user can interact with.
What is blockly programming?
Programming that represents code as interlocking blocks; each block contains pieces of code. The programmer doesn’t need to worry about syntax.
What is the palette panel?
Where you can find the different visible and non-visible components/elements of an app and are grouped by functionality.
What does it mean to call a function?
Carrying out or making a function happen.
What does it mean to invoke a function?
Carrying out or making a function happen.
What is the components panel?
This is a list of the components you’ve chosen and renamed from the palette panel.
What is the workspace in app inventor?
The part where you drag blocks into and construct it.
What is the media panel?
Where you can find images, videos, and audio, or upload it. This is the only panel that is found on both designer and block views.
What is blocks editor view in app inventor?
Where you drag the blocks into the workspace to program the app. Used to determine what the behaviors of the app will be.
What is the designer view in app inventor?
Where you add and organize your components on the screen.
What is a callback function?
A type of function in a program that, once defined, can be called at any point in the program simply by name, instead of repeating all the code.
