GET request with async/await in iOS Swift - Cheat Sheet & Quick Revision

Recall & Review

beginner

What does async/await help you do in Swift networking?

Async/await lets you write asynchronous code that looks like normal, easy-to-read code. It helps you wait for network responses without blocking the app.

beginner

Which Swift type is used to make a GET request asynchronously?

URLSession.shared.data(from:) is used with async/await to make GET requests and get data and response.

intermediate

What is the purpose of 'try' in 'let (data, response) = try await URLSession.shared.data(from: url)'?

'Try' is used because the data task can throw an error if the request fails, so you must handle or propagate errors.

intermediate

How do you check if the GET request was successful in Swift?

Check if the response is an HTTPURLResponse and its statusCode is 200 (OK) to confirm success.

beginner

Why is it important to use async/await instead of completion handlers for GET requests?

Async/await makes code easier to read and maintain by avoiding nested closures and callback hell.

Which Swift method is used with async/await to perform a GET request?

A URLSession.shared.data(from:)

B URLSession.shared.downloadTask(with:)

C URLSession.shared.uploadTask(with:)

D URLSession.shared.dataTask(with:completionHandler:)

URLSession.shared.data(from:) is designed for async/await usage to fetch data from a URL.

What keyword do you use to wait for a network call to finish in Swift async/await?

A wait

B await

C pause

D async

'await' pauses the function until the asynchronous call completes.

What does the 'try' keyword indicate in Swift async calls?

A The call might throw an error

B The call will never fail

C The call is synchronous

D The call is optional

'try' means the function can throw an error, so you must handle it.

How do you confirm a successful HTTP GET response in Swift?

A Check if statusCode == 404

B Check if statusCode == 301

C Check if statusCode == 500

D Check if statusCode == 200

Status code 200 means the request was successful.

Why prefer async/await over completion handlers for GET requests?

A Async/await is slower

B Async/await is harder to read

C Async/await avoids nested callbacks

D Async/await requires more code

Async/await makes asynchronous code look simpler and avoids callback nesting.

Explain how to perform a GET request using async/await in Swift.

Think about how to wait for data and handle errors.

Describe why async/await improves code readability compared to completion handlers in networking.

Imagine reading a story versus a maze.