17.4.2. Interrupt/Callback Model

Try these first

1. 1.

   What is a callback function?

   Hint

   Think about functions that are used after other functions.

2. 2.

   What does asynchronous mean in programming?

   Hint

   Consider tasks that don't wait for others to complete.

3. 3.

   What is the main purpose of a callback function?

   • To execute another function
   • To handle an event
   • To return a value

   Hint

   Think about the role of a function after an event occurs.

4. 4.

   True or False: Asynchronous execution blocks the main thread until completion.

   • True
   • False

   Hint

   Consider how tasks are handled in an event-driven environment.

5. 5.

   Design a simple webpage that implements a button triggering a callback function. Explain the expected behavior when the button is clicked—including the asynchronous nature of the callback.

   Hint

   Consider how the webpage continues to be interactive.

6. 6.

   Analyze a piece of code where callbacks are nested multiple times. Identify the issues that may arise and propose a refactor to reduce complexity.

   Hint

   Think about different ways to handle asynchronous operations in a cleaner way.