App Inventor Knowledge Check

What is the purpose of a user interface in an app?

• The purpose of a user interface in an app is to facilitate user interaction and improve user experience.

• To store user data securely.

• To manage app performance and speed.

• To display advertisements to users.

Name three key elements of user interface design.

• Usability, Visual Design, Accessibility

• Interactivity

• Performance

• Functionality

What is the difference between a button and a text input in UI design?

• A button is always rectangular; a text input is always circular.

• A button triggers actions; a text input collects user text.

• A button collects user text; a text input triggers actions.

• A button is used for navigation; a text input is for displaying images.

How can you ensure your app is user-friendly?

• Conduct user research, create intuitive navigation, maintain design consistency, provide clear feedback, and perform usability testing.

• Limit accessibility features

• Focus solely on aesthetics

• Ignore user feedback

What are the common data storage solutions in App Inventor?

• SQLite Database

• Local Storage

• TinyDB, Firebase, File component

• Cloud Storage

Explain the difference between local storage and cloud storage.

• Local storage is always free, while cloud storage requires a subscription.

• Cloud storage is only accessible through mobile devices, while local storage is not.

• Local storage can be accessed from any device, while cloud storage is limited to one device.

• Local storage is device-specific, while cloud storage is internet-based and accessible from anywhere.

What is a database, and how is it used in app development?

• A database is a programming language used to create apps.

• A database is a type of software that only runs on servers.

• A database is an organized collection of data used in app development to store and manage information.

• A database is a collection of images used for graphic design.

How can you retrieve data from a database in App Inventor?

• Use a local file to retrieve data.

• Use Firebase Database or Web component to retrieve data.

• Access data through a Bluetooth connection.

• Retrieve data using a QR code scanner.

What is an API, and why is it important for app development?

• An API is a set of rules for software communication, crucial for integrating services and speeding up app development.

• An API is a database management tool for storing data.

• APIs are only used for web applications and not mobile apps.

• An API is a programming language for app development.

Describe the process of integrating an API into an app.

• Use a database to store API keys

• Create a user interface for API integration

• Run the app without any API calls

• Integrate an API by making HTTP requests, handling responses, and incorporating data into your app.