Async/await in Unity - Interactive Code Practice

Practice - 5 Tasks

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easy

Complete the code to declare an async method in Unity.

Unity

public async Task [1]() {
    await Task.Delay(1000);
    Debug.Log("Data loaded");
}

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ALoadAsyncData

BLoadDataAsync

CLoadData

DAsyncLoadData

Attempts:

3 left

💡 Hint

Common Mistakes

Naming the method without 'Async' suffix.

Using a name that does not clearly indicate async behavior.

The method name should clearly indicate it is asynchronous by ending with 'Async'.

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medium

Complete the code to await a delay of 2 seconds inside an async method.

Unity

await [1](2000);

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AThread.Sleep

BWaitForSeconds

CTask.Delay

DCoroutine.Wait

Attempts:

3 left

💡 Hint

Common Mistakes

Using Thread.Sleep which blocks the thread.

Using Unity's WaitForSeconds which is for coroutines, not async/await.

In async methods, Task.Delay is used to asynchronously wait without blocking the main thread.

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hard

Fix the error in the async method signature to correctly return a Task.

Unity

public async [1] LoadSceneAsync() {
    await SceneManager.LoadSceneAsync("MainScene").completed;
}

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ATask

Basync void

Cvoid

DIEnumerator

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'void' which cannot be awaited.

Using 'IEnumerator' which is for coroutines, not async/await.

Async methods that perform asynchronous operations should return Task to allow awaiting.

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hard

Fill both blanks to create a dictionary comprehension that maps scene names to their async load tasks if the scene name length is greater than 5.

Unity

var loadTasks = scenes
  .Where(scene => [2] > 5)
  .ToDictionary(scene => scene, scene => [1]);

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ASceneManager.LoadSceneAsync(scene).completed

BLength

Dscene.Length

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect property name for string length.

Not calling the async load method properly.

We use SceneManager.LoadSceneAsync(scene).completed to load scenes asynchronously and check the length of the scene name with scene.Length.

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hard

Fill all three blanks to create a method that asynchronously loads a scene and logs when done.

Unity

public async Task [1](string sceneName) {
    await [2](sceneName).completed;
    Debug.Log([3] + " loaded");
}

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ALoadSceneAsync

BSceneManager.LoadSceneAsync

CsceneName

DLoadAsyncScene

Attempts:

3 left

💡 Hint

Common Mistakes

Not awaiting the async load method.

Logging a wrong variable or string literal.

The method is named LoadSceneAsync, it awaits SceneManager.LoadSceneAsync(sceneName).completed, and logs the sceneName when loading is complete.