Why inheritance is needed in C Sharp (C#) - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare a class Dog that inherits from Animal.

C Sharp (C#)

class Dog : [1] { }

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

ADog

BBase

CAnimal

DObject

Attempts:

3 left

💡 Hint

Common Mistakes

Using the child class name instead of the parent class name.

Using a keyword like 'Base' which is not a class name.

The class Dog inherits from Animal using the colon : syntax.

2fill in blank

medium

Complete the code to call the base class constructor from the derived class Car.

C Sharp (C#)

class Car : Vehicle {
    public Car() : [1]() { }
}

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

Abase

Bthis

Csuper

Dparent

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'this' instead of 'base' to call the base constructor.

Using 'super' which is not a C# keyword.

In C#, base() calls the constructor of the base class.

3fill in blank

hard

Fix the error in the code to override the Speak method in the derived class Cat.

C Sharp (C#)

class Cat : Animal {
    public override void [1]() {
        Console.WriteLine("Meow");
    }
}

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

Aspeak

BSpeak

CSay

DTalk

Attempts:

3 left

💡 Hint

Common Mistakes

Using lowercase 'speak' instead of 'Speak'.

Using a different method name like 'Say' or 'Talk'.

The method name must exactly match the base class method name including case, which is Speak.

4fill in blank

hard

Fill both blanks to create a derived class Bird that inherits from Animal and overrides the Move method.

C Sharp (C#)

class Bird : [1] {
    public override void [2]() {
        Console.WriteLine("Flying");
    }
}

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

AAnimal

BMove

CFly

DSpeak

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong base class name.

Overriding a method with a wrong name.

The class Bird inherits from Animal and overrides the Move method.

5fill in blank

hard

Fill all three blanks to create a dictionary that maps animal names to their sounds using inheritance concepts.

C Sharp (C#)

var sounds = new Dictionary<string, string> {
    { [1], [2] },
    { [3], "Bark" }
};

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

A"Cat"

B"Meow"

C"Dog"

D"Purr"

Attempts:

3 left

💡 Hint

Common Mistakes

Swapping keys and values.

Using incorrect string quotes.

The dictionary maps animal names like "Cat" and "Dog" to their sounds like "Meow" and "Bark".