4.6.2. Use Cases

Try these first

1. 1.

   What is event-driven programming?

   Hint

   Think about user actions in applications.

2. 2.

   Name one language that supports event-driven programming.

   Hint

   Consider the language primarily associated with web development.

3. 3.

   What is the primary focus of event-driven programming?

   • Responding to events
   • Performing calculations
   • Data storage

   Hint

   Consider what drives the execution flow in this type of programming.

4. 4.

   Is JavaScript primarily used for event-driven programming?

   • True
   • False

   Hint

   Think about its usage in front-end development.

5. 5.

   Design a simple event-driven application that responds to three different user inputs (such as button clicks) with unique outputs.

   Hint

   Think about how to manage state and outputs based on the button pressed.

6. 6.

   Evaluate a provided code snippet for potential callback hell. How would you refactor it?

   Hint

   Look for places where callbacks are nested deeper than two levels.