Constructor overloading in C Sharp (C#) - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a constructor that takes no parameters.

C Sharp (C#)

public class Car {
    public string Model;
    [1] {
        Model = "Unknown";
    }
}

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

ACar

BCar()

Cvoid Car()

Dpublic Car()

Attempts:

3 left

💡 Hint

Common Mistakes

Using a return type like void for the constructor.

Not matching the constructor name with the class name.

The constructor must have the same name as the class and no return type. So public Car() is correct.

2fill in blank

medium

Complete the code to define a constructor that takes a string parameter.

C Sharp (C#)

public class Car {
    public string Model;
    [1] {
        Model = model;
    }
}

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Apublic Car(string model)

BCar(string model)

Cvoid Car(string model)

DCar()

Attempts:

3 left

💡 Hint

Common Mistakes

Omitting the public keyword.

Adding a return type like void.

The constructor must be public and have the same name as the class with the parameter list. So public Car(string model) is correct.

3fill in blank

hard

Fix the error in the constructor declaration.

C Sharp (C#)

public class Car {
    public string Model;
    [1] {
        Model = "Default";
    }
}

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Apublic Car()

BCar()

Cvoid Car()

Dpublic void Car()

Attempts:

3 left

💡 Hint

Common Mistakes

Adding a return type like void.

Omitting the access modifier.

Constructors must be public and have no return type. So public Car() is correct.

4fill in blank

hard

Fill both blanks to create two constructors: one default and one with a string parameter.

C Sharp (C#)

public class Car {
    public string Model;
    [1] {
        Model = "Unknown";
    }
    [2] {
        Model = model;
    }
}

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

Apublic Car()

BCar()

Cpublic Car(string model)

Dvoid Car(string model)

Attempts:

3 left

💡 Hint

Common Mistakes

Using void as a return type.

Omitting the access modifier.

The first constructor is the default one with no parameters: public Car(). The second constructor takes a string parameter: public Car(string model).

5fill in blank

hard

Fill all three blanks to create a class with three overloaded constructors.

C Sharp (C#)

public class Car {
    public string Model;
    public int Year;

    [1] {
        Model = "Unknown";
        Year = 0;
    }

    [2] {
        Model = model;
        Year = 0;
    }

    [3] {
        Model = model;
        Year = year;
    }
}

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Apublic Car()

Bpublic Car(string model)

Cpublic Car(string model, int year)

DCar(string model, int year)

Attempts:

3 left

💡 Hint

Common Mistakes

Omitting the public keyword.

Using the wrong constructor name.

Missing parameters or wrong parameter types.

The class has three constructors: a default one with no parameters, one with a string parameter, and one with string and int parameters. All must be public and named after the class.