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Interview Questions on Abstract Classes in C++ : 4

Question: 1

Can we create object of Abstract class?

(A) Yes
(B) No

Compiler
Level: Practitioner Category: abstract_class
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Question: 2

Can we create pointer to Abstract class?

(A) Yes
(B) No

Compiler
Level: Practitioner Category: abstract_class
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Question: 3

#include<iostream>

class cppbuzz{
    
  public:
        cppbuzz(){
            std::cout<<"cppbuzz";
        }
        ~cppbuzz(){
            std::cout<<"~cppbuzz";
        }
        
        virtual void myfunc() = 0;
};

int main(){
    cppbuzz obj;
    return 0;
}

(A) error: cannot declare variable ‘obj’ to be of abstract type ‘cppbuzz’
(B) cppbuzz
(C) ~cppbuzz
(D) cppbuzz~cppbuzz

Compiler
Level: Practitioner Category: abstract_class
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Question: 4

//if the size of a is 4 bytes then find the output of below code 

#include<iostream>

class cppbuzz{
    private: int a;
    public: virtual void myfunc()=0;
};

int main(){
    std::cout<<sizeof(cppbuzz);
    return 0;
}

(A) 4
(B) 8
(C) 12
(D) 16

Compiler
Level: Expert Category: abstract_class
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Interview Questions on Abstract Classes in C++ : 4

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