Async-Await

The video tutorial introduces the async/await syntax and demonstrates its application in JavaScript. It covers creating async functions, using promises with async/await, and testing the code. The tutorial includes challenges to reinforce learning, such as deleting a task and counting remaining tasks. The video concludes with a discussion on applying async/await in a task manager application.

What is the primary purpose of using async/await in JavaScript?

• To replace all synchronous code

• To handle asynchronous operations more easily

• To avoid using functions

• To make code run faster

In the context of async functions, what does the 'await' keyword do?

• Cancels the promise

• Converts a promise into a synchronous operation

• Speeds up the function execution

• Pauses the function execution until the promise is resolved

What is the benefit of using async/await over promise chaining?

• It eliminates the need for error handling

• It makes the code more readable and maintainable

• It allows synchronous execution of code

• It automatically optimizes the code

What is the purpose of the 'updateAgeAndCount' function in the example?

• To log user information

• To create a new user

• To update a user's age and count users with the same age

• To delete a user from the database

How can you handle errors in an async function?

• Using a try-catch block

• By ignoring them

• Using a synchronous function

• By logging them to the console

What is the main task in the async/await challenge presented?

• To create a new task

• To log all tasks

• To delete a task and count incomplete tasks

• To update a user's email

What should the 'deleteTaskAndCount' function return?

• The ID of the deleted task

• The count of incomplete tasks

• The deleted task

• The total number of tasks

What is the advantage of storing the result of 'findByIdAndDelete' in a variable?

• It speeds up the operation

• It allows you to use the result later if needed

• It prevents errors

• It automatically logs the result

What is the next step after completing the async/await challenge?

• To learn about synchronous functions

• To update the database schema

• To explore async/await in route handlers

• To delete more tasks

What is the benefit of using async/await in route handlers?

• It speeds up the server

• It automatically handles all errors

• It eliminates the need for routes

• It makes the code look synchronous and easier to read