[Solved] Find the problem in this code that prevents runtime polymorphism:cl... Find the problem in this code that prevents runtime polymorphism:class Base { public void Display() { Console.WriteLine("Base"); | C Sharp (C#)

C Sharp (C#) - Polymorphism and Abstract Classes

Find the problem in this code that prevents runtime polymorphism:

class Base { public void Display() { Console.WriteLine("Base"); } } class Derived : Base { public override void Display() { Console.WriteLine("Derived"); } }

ABase method must be virtual to allow override

BDerived method should not use override keyword

CDisplay method must be static

DNo problem, code works fine

Step-by-Step Solution

Solution:

Step 1: Check base method declaration
Base class method Display is not marked virtual, so it cannot be overridden.
Step 2: Understand override requirements
Derived class tries to override, but base method must be virtual or abstract for this to work.
Final Answer:
Base method must be virtual to allow override -> Option A
Quick Check:
Virtual needed in base for override [OK]

Quick Trick: Base method must be virtual to enable overriding [OK]

Common Mistakes:

MISTAKES

Trying to override non-virtual methods
Ignoring virtual keyword in base class
Misusing override keyword without virtual base

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More C Sharp (C#) Quizzes

Find the problem in this code that prevents runtime polymorphism:

Step 1: Check base method declaration

Step 2: Understand override requirements

Final Answer:

Quick Check:

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