The Modern JavaScript Bootcamp (2019) - Converting to Promises

What is the primary goal of converting callback patterns to promises in JavaScript?

• To reduce the number of lines of code

• To increase the security of the code

• To simplify asynchronous code handling

• To make the code run faster

What is a key advantage of using shorthand syntax in arrow functions?

• It enables the use of more parameters

• It makes the code more readable

• It allows for faster execution

• It increases the function's scope

What is the purpose of the resolve function in a promise?

• To handle errors

• To execute synchronous code

• To return a value when the promise is fulfilled

• To delay the execution of code

When converting getPuzzle to a promise-based API, what is removed from the function signature?

• The callback argument

• The return type

• The HTTP method

• The URL parameter

What does the reject function do in a promise?

• It logs the error to the console

• It indicates that the promise has failed

• It handles successful operations

• It resolves the promise

In the app.js file, what method is used to handle the resolved and rejected states of a promise?

• catch

• finally

• then

• resolve

What is the benefit of using promises over callbacks?

• Promises provide better error handling

• Promises are faster

• Promises are easier to debug

• Promises use less memory

What is the role of the then method in promise handling?

• To initialize a new promise

• To execute code after a promise is fulfilled or rejected

• To delay the execution of a promise

• To catch errors in the promise

What is the first step in the challenge to convert getCountry to use promises?

• Add a new parameter

• Change the URL

• Return a new promise

• Remove the resolve call

How can you simulate an error in the getCountry function?

• By using a different API

• By removing the resolve call

• By adding extra characters to the URL

• By changing the HTTP method