Async/Await

The video tutorial introduces async and await in JavaScript, explaining their role in handling asynchronous functions. It provides a code example using a ZIP code lookup to demonstrate the cleaner syntax of async and await compared to traditional promises. The tutorial walks through the code, detailing the use of fetch and await, and highlights the advantages of async/await for readability. The video concludes by transitioning to a discussion on string functions.

What prompted the creation of async and await in JavaScript?

• The popularity of service-based architectures

• The complexity of callback functions

• The limitations of JavaScript syntax

• The need for synchronous functions

What is the primary purpose of the 'await' keyword in JavaScript?

• To declare a function

• To handle errors in asynchronous code

• To pause execution until a promise is resolved

• To create a new promise

In the provided code example, what does the 'getResponse' function do?

• Logs the response to the console

• Displays the city and state for a given ZIP code

• Fetches a ZIP code from the user

• Handles button click events

Why is it necessary to label a function with 'async'?

• To enable the use of 'await' within the function

• To make the function run faster

• To convert the function into a promise

• To handle synchronous operations

What happens if 'displayResult' is called before data is available?

• It will cause a runtime error

• It will return undefined

• It will display an error message

• It will display default values

What is the main advantage of using async/await over promises?

• Async/await is easier to read and write

• Promises are deprecated

• Async/await is faster

• Async/await is more powerful

Which of the following is a requirement for using 'await' in a function?

• The function must be labeled with 'async'

• The function must return a promise

• The function must be a callback

• The function must be synchronous