Returning values from async methods in C Sharp (C#) - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare an async method that returns an integer.

C Sharp (C#)

public async Task<[1]> GetNumberAsync() {
    return 42;
}

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ATask

Bvoid

Cstring

Dint

Attempts:

3 left

💡 Hint

Common Mistakes

Using void as return type for async methods that return a value.

Using Task without specifying the type parameter.

The method returns a Task wrapping an integer, so the return type is Task<int>.

2fill in blank

medium

Complete the code to await an async method and get its result.

C Sharp (C#)

int result = await GetNumberAsync();
Console.WriteLine([1]);

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Aawait

BGetNumberAsync()

Cresult

DTask<int>

Attempts:

3 left

💡 Hint

Common Mistakes

Trying to print the method call instead of the awaited result.

Using await inside Console.WriteLine without storing the result.

You should print the variable result which holds the awaited value.

3fill in blank

hard

Fix the error in the async method to correctly return a string value.

C Sharp (C#)

public async Task<string> GetMessageAsync() {
    [1] "Hello";
}

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Areturn

Byield

Cawait

Dthrow

Attempts:

3 left

💡 Hint

Common Mistakes

Using await without returning a value.

Using yield in an async method.

Async methods returning a value must use return to send back the result.

4fill in blank

hard

Fill both blanks to create a dictionary comprehension that filters async results.

C Sharp (C#)

var results = new Dictionary<string, int> {
    {"score", [1],
    {"count", [2]
};

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Aawait GetScoreAsync()

Bawait GetCountAsync()

CGetScoreAsync()

DGetCountAsync()

Attempts:

3 left

💡 Hint

Common Mistakes

Using async method calls without await, resulting in Task objects instead of values.

Mixing awaited and non-awaited calls.

To get the actual values from async methods, you must await them.

5fill in blank

hard

Fill all three blanks to create an async method that returns a dictionary with awaited values.

C Sharp (C#)

public async Task<Dictionary<string, int>> GetDataAsync() {
    return new Dictionary<string, int> {
        {"a", [1],
        {"b", [2],
        {"c", [3]
    };
}

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Aawait GetAAsync()

Bawait GetBAsync()

Cawait GetCAsync()

DGetAAsync()

Attempts:

3 left

💡 Hint

Common Mistakes

Returning Tasks instead of awaited results.

Forgetting to await one or more async calls.

Each async method call must be awaited to get the integer values before returning the dictionary.