Async functions declaration in Swift - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare an async function named fetchData.

Swift

func fetchData() [1] {
    // function body
}

Drag options to blanks, or click blank then click option'

Athrows

Bsync

Cawait

Dasync

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'await' instead of 'async' in the function declaration.

Forgetting to mark the function as async.

The keyword async declares the function as asynchronous.

2fill in blank

medium

Complete the code to declare an async function that throws errors.

Swift

func loadData() [1] throws {
    // function body
}

Drag options to blanks, or click blank then click option'

Aawait

Basync

Csync

Dtry

Attempts:

3 left

💡 Hint

Common Mistakes

Placing 'throws' before 'async'.

Using 'await' in the function declaration.

The async keyword must come before throws in the function declaration.

3fill in blank

hard

Fix the error in the async function declaration.

Swift

func processData() [1] throws {
    // function body
}

Drag options to blanks, or click blank then click option'

Aasync

Bsync

Cawait

Dtry

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'await' instead of 'async'.

Forgetting to include the async keyword.

The async keyword must be placed before throws in the function declaration.

4fill in blank

hard

Fill both blanks to declare an async throwing function named fetchUser.

Swift

func fetchUser() [1] [2] {
    // function body
}

Drag options to blanks, or click blank then click option'

Aasync

Bthrows

Cawait

Dsync

Attempts:

3 left

💡 Hint

Common Mistakes

Reversing the order to 'throws async'.

Using 'await' in the declaration.

The correct order is async throws to declare an async function that can throw errors.

5fill in blank

hard

Fill all three blanks to declare an async function named downloadData that returns a String and can throw errors.

Swift

func downloadData() [1] [2] -> [3] {
    // function body
}

Drag options to blanks, or click blank then click option'

Aasync

Bthrows

CString

DVoid

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'Void' as return type instead of 'String'.

Placing 'throws' before 'async'.

The function is declared as async throws and returns a String.