Protected access modifier in C Sharp (C#) - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare a protected method named ShowMessage.

C Sharp (C#)

protected void [1]() {
    Console.WriteLine("Hello from protected method!");
}

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ADisplay

BShowMessage

CPrintMessage

DMessageShow

Attempts:

3 left

💡 Hint

Common Mistakes

Using a different method name than declared.

Confusing method name with access modifier.

The method name must be ShowMessage as declared.

2fill in blank

medium

Complete the code to allow the derived class to access the base class's protected method.

C Sharp (C#)

class BaseClass {
    protected void [1]() {
        Console.WriteLine("Base class method");
    }
}

class DerivedClass : BaseClass {
    public void CallBase() {
        [1]();
    }
}

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ABaseMethod

BDisplay

CShow

DProtectedMethod

Attempts:

3 left

💡 Hint

Common Mistakes

Trying to call a method not declared in the base class.

Using a public method name instead of the protected one.

The protected method name is BaseMethod, which the derived class can call.

3fill in blank

hard

Fix the error in accessing the protected member from outside the class hierarchy.

C Sharp (C#)

class MyClass {
    protected int [1] = 10;
}

class OtherClass {
    public void Access() {
        MyClass obj = new MyClass();
        Console.WriteLine(obj.[1]);
    }
}

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Avalue

Bnumber

Cdata

Dsecret

Attempts:

3 left

💡 Hint

Common Mistakes

Trying to access protected members from unrelated classes.

Confusing protected with public access.

The protected member is named secret. However, it cannot be accessed from OtherClass because it is not derived from MyClass.

This code will cause a compile error because protected members are only accessible within the class and its subclasses.

4fill in blank

hard

Fill both blanks to correctly override a protected method in the derived class.

C Sharp (C#)

class Parent {
    protected virtual void [1]() {
        Console.WriteLine("Parent method");
    }
}

class Child : Parent {
    protected override void [2]() {
        Console.WriteLine("Child method");
    }
}

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ADisplay

BShow

CExecute

DRun

Attempts:

3 left

💡 Hint

Common Mistakes

Using different method names in parent and child classes.

Forgetting the override keyword.

The method name must be the same in both parent and child classes to override correctly. Here, Show is used.

5fill in blank

hard

Fill all three blanks to create a protected property with a getter and setter in a class.

C Sharp (C#)

class Sample {
    protected [1] [2] { get; [3]; }
}

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Aint

BValue

Cset

Dget

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong data type or property name.

Omitting the setter keyword.

The property is of type int, named Value, with a getter and setter. The setter keyword is needed to allow setting the property.