The Modern JavaScript Bootcamp (2019) - Callback Abstraction Challenge

The video tutorial explains how to use callbacks and asynchronous execution to create a function that retrieves country details based on a country code. It outlines the steps to abstract HTTP request logic into a separate function, similar to the getPuzzle function. The tutorial also covers modifying getPuzzle to accept additional arguments and demonstrates implementing and testing the getCountry function, focusing on error handling and using callback functions effectively.

What is the primary purpose of using callbacks in asynchronous execution?

• To execute code synchronously

• To simplify code structure

• To handle events after a task is completed

• To increase the speed of execution

What are the two arguments required for the new function to fetch country details?

• Country name and callback function

• Country code and callback function

• Country name and HTTP request

• Country code and HTTP request

In the context of the video, what is the role of the callback function when fetching country details?

• To store the country details

• To handle the response or error from the HTTP request

• To initiate the HTTP request

• To log the country code

How can the get puzzle function be modified to accept a word count?

• By changing the return type

• By passing the word count as an additional argument

• By adding a new function

• By using a static value

What syntax is used to dynamically insert values into strings in JavaScript?

• Single quotes

• Concatenation

• Double quotes

• Template strings

What should be done if an error occurs while fetching country details?

• Terminate the program

• Log the error message

• Ignore the error

• Retry the request

What is the expected output when the get country function is called with the code 'US'?

• Country code: US

• Error: Unable to fetch data

• Country name: Mexico

• Country name: United States of America