Action delegate type in C Sharp (C#) - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare an Action delegate that takes no parameters.

C Sharp (C#)

Action [1] = () => Console.WriteLine("Hello World");

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

APrintMessage

BprintMessage

Cprint_message

Dprintmessage

Attempts:

3 left

💡 Hint

Common Mistakes

Using lowercase or underscore in delegate variable names.

Forgetting to assign a lambda expression.

The variable name for the Action delegate should follow C# naming conventions, so PrintMessage is the best choice.

2fill in blank

medium

Complete the code to declare an Action delegate that takes one integer parameter and prints it.

C Sharp (C#)

Action<int> printNumber = [1] => Console.WriteLine([1]);

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

Anum

Bnumber

Cx

Dval

Attempts:

3 left

💡 Hint

Common Mistakes

Using different names for the parameter and inside the lambda body.

Using reserved keywords as parameter names.

The parameter name num is used consistently in the lambda expression.

3fill in blank

hard

Fix the error in the Action delegate declaration that takes two string parameters and prints them.

C Sharp (C#)

Action<string, string> printNames = ([1], lastName) => Console.WriteLine($"First: { [1] }, Last: {lastName}");

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

Afirst

Bname

CfirstName

Dfname

Attempts:

3 left

💡 Hint

Common Mistakes

Using a parameter name in the lambda that does not match the one in the body.

Using too short or unclear parameter names.

The parameter firstName is used consistently in the lambda expression and the string interpolation.

4fill in blank

hard

Fill both blanks to create an Action delegate that takes a string and an int, then prints them formatted.

C Sharp (C#)

Action<string, int> printInfo = ([1], [2]) => Console.WriteLine($"Name: { [1] }, Age: { [2] }");

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

Aname

Bage

Cyears

Dperson

Attempts:

3 left

💡 Hint

Common Mistakes

Mismatching parameter names between declaration and usage.

Using unclear or unrelated names.

The parameter names name and age are used consistently in the lambda expression and the output string.

5fill in blank

hard

Fill all three blanks to create an Action delegate that takes three parameters and prints a formatted message.

C Sharp (C#)

Action<string, int, bool> printDetails = ([1], [2], [3]) => Console.WriteLine($"Name: { [1] }, Age: { [2] }, Active: { [3] }");

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

AuserName

BuserAge

CisActive

Dstatus

Attempts:

3 left

💡 Hint

Common Mistakes

Using inconsistent parameter names.

Choosing unclear or generic names.

The parameter names userName, userAge, and isActive are used consistently in the lambda and output.