Computed properties in C Sharp (C#) - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a computed property that returns the full name.

C Sharp (C#)

public class Person {
    public string FirstName { get; set; }
    public string LastName { get; set; }
    public string FullName => [1];
}

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

AFirstName + " " + LastName

BFirstName - LastName

CFirstName / LastName

DFirstName * LastName

Attempts:

3 left

💡 Hint

Common Mistakes

Using arithmetic operators like - or * instead of + for strings.

Forgetting to add a space between names.

The computed property FullName combines FirstName and LastName with a space.

2fill in blank

medium

Complete the code to create a computed property that returns the area of a rectangle.

C Sharp (C#)

public class Rectangle {
    public double Width { get; set; }
    public double Height { get; set; }
    public double Area => [1];
}

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

AWidth - Height

BWidth / Height

CWidth * Height

DWidth + Height

Attempts:

3 left

💡 Hint

Common Mistakes

Adding width and height instead of multiplying.

Using division or subtraction by mistake.

The computed property Area multiplies Width and Height to get the rectangle's area.

3fill in blank

hard

Fix the error in the computed property that returns the initials of a person.

C Sharp (C#)

public class Person {
    public string FirstName { get; set; }
    public string LastName { get; set; }
    public string Initials => [1];
}

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

AFirstName[0].ToString() + " " + LastName[0].ToString()

BFirstName[0] + LastName[0]

CFirstName.Substring(0, 1) + LastName.Substring(0, 1)

DFirstName[0].ToString() + LastName[0].ToString()

Attempts:

3 left

💡 Hint

Common Mistakes

Adding chars directly without converting to string.

Forgetting to add a space between initials.

The computed property Initials returns the first letters of FirstName and LastName separated by a space. Using ToString() converts chars to strings for concatenation.

4fill in blank

hard

Fill both blanks to create a computed property that returns the perimeter of a rectangle.

C Sharp (C#)

public class Rectangle {
    public double Width { get; set; }
    public double Height { get; set; }
    public double Perimeter => 2 * ([1] + [2]);
}

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

AWidth

BHeight

CLength

DDepth

Attempts:

3 left

💡 Hint

Common Mistakes

Using properties that don't exist like Length or Depth.

Forgetting to add both width and height inside the parentheses.

The perimeter of a rectangle is 2 times the sum of its width and height.

5fill in blank

hard

Fill all three blanks to create a computed property that returns the volume of a box.

C Sharp (C#)

public class Box {
    public double Width { get; set; }
    public double Height { get; set; }
    public double Depth { get; set; }
    public double Volume => [1] * [2] * [3];
}

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

AWidth

BHeight

CDepth

DLength

Attempts:

3 left

💡 Hint

Common Mistakes

Using a property named Length which does not exist.

Missing one of the dimensions in the multiplication.

The volume of a box is the product of its width, height, and depth.