Class declaration syntax in C Sharp (C#) - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare a simple class named Car.

C Sharp (C#)

public [1] Car {
    // class body
}

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

Ainterface

Bstruct

Cclass

Denum

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'struct' instead of 'class' for class declaration.

Using 'interface' or 'enum' which are different types.

The keyword class is used to declare a class in C#.

2fill in blank

medium

Complete the code to declare a public class named Person.

C Sharp (C#)

[1] class Person {
    // properties and methods
}

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

Apublic

Bprotected

Cprivate

Dinternal

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'private' which restricts access.

Using 'protected' which is for inheritance only.

The keyword public makes the class accessible from other parts of the program.

3fill in blank

hard

Fix the error in the class declaration to make it valid.

C Sharp (C#)

public class [1] {
    // class body
}

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

ACar123

B123Car

CCar-Model

DCar Model

Attempts:

3 left

💡 Hint

Common Mistakes

Starting class name with a number.

Including spaces or hyphens in the class name.

Class names must start with a letter and cannot contain spaces or hyphens. Car123 is valid.

4fill in blank

hard

Fill both blanks to declare a sealed class named Logger.

C Sharp (C#)

[1] sealed [2] Logger {
    // class body
}

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

Apublic

Bclass

Cstruct

Dprivate

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'struct' instead of 'class'.

Using 'private' when 'public' is needed.

The correct syntax is public sealed class Logger. public is the access modifier and class declares the type.

5fill in blank

hard

Fill all three blanks to declare an abstract class named Shape with public access.

C Sharp (C#)

[1] [2] [3] Shape {
    // class body
}

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

Aprotected

Babstract

Cclass

Dpublic

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'protected' instead of 'public'.

Omitting the 'abstract' keyword.

Using 'struct' instead of 'class'.

The correct declaration is public abstract class Shape. public is the access modifier, abstract means the class cannot be instantiated, and class declares the type.