[Solved] Examine the following code snippet:abstract class Appliance { public abstract void TurnOn(); } class Blender :... } }What is the main issue with this code? | C Sharp (C#)

C Sharp (C#) - Interfaces

Examine the following code snippet:

abstract class Appliance {
    public abstract void TurnOn();
}
class Blender : Appliance {
    public void TurnOn(int speed) { Console.WriteLine($"Blender started at speed {speed}"); }
}

What is the main issue with this code?

AThe base class should not have abstract methods

BAbstract classes cannot have methods with parameters

CThe derived class does not correctly override the abstract method TurnOn()

DThe derived class cannot have methods with parameters

Step-by-Step Solution

Solution:

Step 1: Check abstract method signature
The base class declares an abstract method TurnOn() with no parameters.
Step 2: Check derived class method
The derived class defines TurnOn(int speed), which is an overload, not an override.
Step 3: Understand override requirement
To implement the abstract method, the derived class must provide a method with the exact signature: public override void TurnOn().
Final Answer:
The derived class does not override the abstract method correctly -> Option C
Quick Check:
Method signatures must match for overrides [OK]

Quick Trick: Override abstract methods with exact signature [OK]

Common Mistakes:

MISTAKES

Assuming method overloading satisfies abstract method implementation
Thinking abstract methods can have parameters changed in derived classes
Believing abstract classes cannot have abstract methods with no parameters

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More C Sharp (C#) Quizzes

Examine the following code snippet:

Step 1: Check abstract method signature

Step 2: Check derived class method

Step 3: Understand override requirement

Final Answer:

Quick Check:

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