Properties vs fields in C Sharp (C#) - Interactive Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare a public field named 'age' of type int.

C Sharp (C#)

public class Person {
    public [1] age;
}

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

Aint

BAge

Cstring

Dprivate

Attempts:

3 left

💡 Hint

Common Mistakes

Using a capitalized name like 'Age' as a type.

Using 'string' instead of 'int' for an age field.

Using access modifiers like 'private' instead of a type.

The field 'age' should be declared with the type int to store integer values.

2fill in blank

medium

Complete the code to declare a public property named 'Age' with get and set accessors.

C Sharp (C#)

public class Person {
    public int [1] { get; set; }
}

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Aage

BageValue

CAGE

DAge

Attempts:

3 left

💡 Hint

Common Mistakes

Using lowercase 'age' for a property name.

Using all uppercase 'AGE' which is uncommon.

Using a different name like 'ageValue' without reason.

Properties usually start with a capital letter, so Age is the correct property name.

3fill in blank

hard

Fix the error in the property declaration by completing the code.

C Sharp (C#)

public class Person {
    private int _age;
    public int Age {
        get { return [1]; }
        set { _age = value; }
    }
}

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A_age

BAge

Cvalue

Dage

Attempts:

3 left

💡 Hint

Common Mistakes

Returning the property name 'Age' inside its own getter causes recursion.

Returning 'value' inside getter is incorrect.

Using 'age' without underscore when the field is '_age'.

The getter should return the private field _age to provide the stored value.

4fill in blank

hard

Fill both blanks to create a property 'Name' with a private field '_name' and a setter that trims whitespace.

C Sharp (C#)

public class Person {
    private string [1];
    public string Name {
        get { return [2]; }
        set { [2] = value.Trim(); }
    }
}

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A_name

BName

C_age

Dname

Attempts:

3 left

💡 Hint

Common Mistakes

Using the property name 'Name' inside getter or setter causes recursion.

Using a different field name in getter and setter.

Not trimming the value in setter.

The private field is '_name' and both getter and setter use it to store and return the trimmed name.

5fill in blank

hard

Fill all three blanks to create a read-only property 'IsAdult' that returns true if 'Age' is 18 or more.

C Sharp (C#)

public class Person {
    public int Age { get; set; }
    public bool [1] {
        get { return Age [2] [3]; }
    }
}

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

AIsAdult

B>=

C18

DAge

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'Age' as property name instead of 'IsAdult'.

Using '<' or '>' instead of '>='.

Comparing to a wrong number.

The property 'IsAdult' returns true when 'Age' is greater than or equal to 18.