C++ | Virtual Functions | Question 6

Predict the output of following program.

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#include<iostream>
using namespace std;
class Base
{
public:
    virtual void show() = 0;
};
  
class Derived : public Base { };
  
int main(void)
{
    Derived q;
    return 0;
}

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(A) Compiler Error: there cannot be an empty derived class

(B) Compiler Error: Derived is abstract

(C) No compiler Error



 Answer: (B) 

Explanation: If we don’t override the pure virtual function in derived class, then derived  class also  becomes abstract class. 



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