Integrating Async-Await

The video tutorial covers the use of async await in JavaScript to improve the syntax of route handlers in an Express application. It begins with an introduction to async await, followed by a step-by-step refactoring of user-related routes. The tutorial includes testing these routes using Postman. A challenge is presented to refactor task-related routes, which is then demonstrated. The video concludes with testing the refactored task routes.

What is the primary advantage of using async/await over traditional promise chaining in Express.js?

• It allows synchronous code execution.

• It improves server performance.

• It simplifies error handling with try-catch.

• It eliminates the need for callbacks.

Why is it necessary to mark a function as async in Express.js?

• To improve the function's performance.

• To automatically handle errors.

• To convert the function into a callback.

• To enable the use of the await keyword.

What is the purpose of using try-catch blocks when refactoring routes with async/await?

• To improve code readability.

• To handle errors and provide appropriate responses.

• To log errors to the console.

• To automatically retry failed requests.

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

• It converts a promise into a callback.

• It automatically retries failed promises.

• It logs the promise result to the console.

• It pauses the function execution until the promise is resolved.

What status code is typically used to indicate a successful creation of a resource in Express.js?

• 500

• 200

• 201

• 400

What should you do if a user is not found when using async/await in a route handler?

• Return a 500 status code.

• Retry the request.

• Log the error and continue.

• Return a 404 status code.

What is the first step in refactoring task-related routes using async/await?

• Test the existing routes.

• Mark the function as async.

• Remove all existing code.

• Add error logging.

How can you ensure that your refactored routes are working correctly?

• By using console logs.

• By reviewing the code manually.

• By checking server logs.

• By testing them with Postman.

What is a common mistake to avoid when using async/await in Express.js?

• Using too many async functions.

• Returning promises directly.

• Using try-catch blocks for synchronous code.

• Using await outside of an async function.

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

• It automatically optimizes database queries.

• It eliminates the need for error handling.

• It simplifies the code structure.

• It reduces server load.