What is C# - Interactive Quiz & Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to print "Hello, World!" in C#.

C Sharp (C#)

using System;

class Program {
    static void Main() {
        Console.[1]("Hello, World!");
    }
}

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

ADisplay

BPrint

COutput

DWriteLine

Attempts:

3 left

💡 Hint

Common Mistakes

Using methods like Print or Display which do not exist in C# Console class.

In C#, Console.WriteLine prints text to the screen with a new line.

2fill in blank

medium

Complete the code to declare an integer variable named 'age' with value 25.

C Sharp (C#)

int [1] = 25;

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Aage

Bvalue

Cnumber

Dcount

Attempts:

3 left

💡 Hint

Common Mistakes

Using generic names like number or value instead of 'age'.

Variable names should be meaningful. Here, age is the correct variable name.

3fill in blank

hard

Fix the error in the code to correctly declare a string variable with value "C#".

C Sharp (C#)

string language = [1]C#[1];

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

A`

B"

C'

D/

Attempts:

3 left

💡 Hint

Common Mistakes

Using single quotes which are for characters, not strings.

Strings in C# must be enclosed in double quotes "".

4fill in blank

hard

Fill the blank to create a simple if statement that checks if number is greater than 10.

C Sharp (C#)

if (number [1] 10) {
    Console.WriteLine("Number is greater");
}

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

A!=

B<

C>

D==

Attempts:

3 left

💡 Hint

Common Mistakes

Using < or == which do not check for greater than.

The operator > checks if the left value is greater than the right value.

5fill in blank

hard

Fill all three blanks to declare a list of integers and add the number 5 to it.

C Sharp (C#)

List<int> numbers = new [1]<int>();
numbers.[2](5);
Console.WriteLine(numbers.[3]);

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

AList

BAdd

CCount

DArray

Attempts:

3 left

💡 Hint

Common Mistakes

Using Array instead of List.

Using wrong method names like Insert instead of Add.

Using Length instead of Count for List.

Use List to create a list, Add to add an item, and Count to get the number of items.