Inheritance In C Plus Plus — Part 2 MCQs with Explanations

I'm a Mammal I'm a Human I'm a Male is the correct answer to “What will be the output of the following C++ code? #include <iostream> #include <string> using namespace std; class Mammal { public: Mammal(){ cout<<"I'm a Mammal\n"; } ~Mammal(){} }; class Human: public Mammal { public: Human(){ cout<<"I'm a Human\n"; } ~Human(){} }; class Male: public Human { public: Male(){ cout<<"I'm a Male\n"; } ~Male(){} }; class Female: public Human { public: Female(){ cout<<"I'm a Female\n"; } ~Female(){} }; int main(int argc, char const *argv[]) { Male M; return 0; }”. This question is standard in competitive examination syllabi for Inheritance In C Plus Plus.

Segmentation Fault is the correct answer to “What will be the output of the following C++ code? #include <iostream> #include <string> using namespace std; class A { float d; public: virtual void func(){ cout<<"Hello this is class A\n"; } }; class B: public A { int a = 15; public: void func(){ cout<<"Hello this is class B\n"; } }; int main(int argc, char const *argv[]) { A *a; a->func(); return 0; }”. This question is standard in competitive examination syllabi for Inheritance In C Plus Plus.

They are used to hide objects is the correct answer to “Which statement is incorrect about virtual function.”. This question is standard in competitive examination syllabi for Inheritance In C Plus Plus.

a: 1 is the correct answer to “What will be the output of the following C++ code? #include <iostream> #include <string> using namespace std; class A { int a; public: A(){ a = 0; } void show(){ a++; cout<<"a: "<<a<<endl; } }; class B: public A { public: }; int main(int argc, char const *argv[]) { B b; b.show(); return 0; }”. This question is standard in competitive examination syllabi for Inheritance In C Plus Plus.

virtual int func() is the correct answer to “Which is the correct syntax of declaring a virtual function”. This question is standard in competitive examination syllabi for Inheritance In C Plus Plus.

Error is the correct answer to “What will be the output of the following C++ code? #include <iostream> #include <string> using namespace std; class A { int a; public: A(){ a = 0; } static void show(){ a++; cout<<a; } }; class B: public A { public: }; int main(int argc, char const *argv[]) { B b; b.show(); return 0; }”. This question is standard in competitive examination syllabi for Inheritance In C Plus Plus.

Error is the correct answer to “What will be the output of the following C++ code? #include <iostream> #include <string> using namespace std; class A { public: virtual A(){ cout<<"A's Constructor\n"; } }; class B: public A { public: A(){ cout<<"Present inside the class B\n"; } }; int main(int argc, char const *argv[]) { A a; return 0; }”. This question is standard in competitive examination syllabi for Inheritance In C Plus Plus.

Program will compile successfully is the correct answer to “What happens if the following C++ program is compiled? #include <iostream> #include <string> using namespace std; class A { int a; public: A(){ a = 0; } void show(){ a++; cout<<"a: "<<a<<endl; } }; class B: private A { public: void show(){ show(); } }; int main(int argc, char const *argv[]) { B b; b.show(); return 0; }”. This question is standard in competitive examination syllabi for Inheritance In C Plus Plus.

Error is the correct answer to “What will be the output of the following C++ code? #include <iostream> using namespace std; class Base { public: virtual void print() const = 0; }; class DerivedOne : public Base { public: void print() const { cout << "DerivedOne\n"; } }; class DerivedTwo : public Base { public: void print() const { cout << "DerivedTwo\n"; } }; class Multiple : public DerivedOne, public DerivedTwo { public: void print() const { DerivedTwo :: print(); } }; int main() { int i; Multiple both; DerivedOne one; DerivedTwo two; Base *array[ 3 ]; array[ 0 ] = &both; array[ 1 ] = &one; array[ 2 ] = &two; array[ i ] -> print(); return 0; }”. This question is standard in competitive examination syllabi for Inheritance In C Plus Plus.

Adapter and observer pattern is the correct answer to “Which design patterns benefit from the multiple inheritances”. This question is standard in competitive examination syllabi for Inheritance In C Plus Plus.

Error is the correct answer to “What will be the output of the following C++ code? #include <iostream> #include <string> using namespace std; class A { public: virtual static void show(){ cout<<"class A\n"; } }; class B: public A { public: static void show(){ cout<<"class B\n"; } }; int main(int argc, char const *argv[]) { A *a = new A(); B b; a = &b; a->show(); return 0; }”. This question is standard in competitive examination syllabi for Inheritance In C Plus Plus.

Constructor of class A Constructor of class B is the correct answer to “What will be the output of the following C++ code? #include <iostream> #include <string> using namespace std; class A { float d; public: A(){ cout<<"Constructor of class A\n"; } }; class B: public A { int a = 15; public: B(){ cout<<"Constructor of class B\n"; } }; int main(int argc, char const *argv[]) { B b; return 0; }”. This question is standard in competitive examination syllabi for Inheritance In C Plus Plus.

3010 is the correct answer to “What will be the output of the following C++ code? #include <iostream> using namespace std; class student { public: int rno , m1 , m2 ; void get() { rno = 15, m1 = 10, m2 = 10; } }; class sports { public: int sm; void getsm() { sm = 10; } }; class statement:public student,public sports { int tot,avg; public: void display() { tot = (m1 + m2 + sm); avg = tot / 3; cout << tot; cout << avg; } }; int main() { statement obj; obj.get(); obj.getsm(); obj.display(); }”. This question is standard in competitive examination syllabi for Inheritance In C Plus Plus.

A virtual function that has no definition relative to the base class is the correct answer to “What is a pure virtual function”. This question is standard in competitive examination syllabi for Inheritance In C Plus Plus.

I'm a Mammal I'm a Male is the correct answer to “What will be the output of the following C++ code? #include <iostream> #include <string> using namespace std; class Mammal { public: virtual void Define(){ cout<<"I'm a Mammal\n"; } }; class Human: public Mammal { public: void Define(){ cout<<"I'm a Human\n"; } }; class Male: public Human { public: void Define(){ cout<<"I'm a Male\n"; } }; class Female: public Human { public: void Define(){ cout<<"I'm a Female\n"; } }; int main(int argc, char const *argv[]) { Mammal *M = new Mammal(); Male m; Female f; *M = m; M->Define(); M = &m; M->Define(); return 0; }”. This question is standard in competitive examination syllabi for Inheritance In C Plus Plus.

Inherited is the correct answer to “What will be the output of the following C++ code? #include <iostream> using namespace std; struct a { int count; }; struct b { int* value; }; struct c : public a, public b { }; int main() { c* p = new c; p->value = 0; cout << "Inherited"; return 0; }”. This question is standard in competitive examination syllabi for Inheritance In C Plus Plus.

Both 100 & 200 is the correct answer to “What will be the output of the following C++ code? #include <iostream> using namespace std; class Base1 { protected: int SampleDataOne; public: Base1() { SampleDataOne = 100; } ~Base1() { } int SampleFunctOne() { return SampleDataOne; } }; class Base2 { protected: int SampleDataTwo; public: Base2() { SampleDataTwo = 200; } ~Base2() { } int SampleFunctTwo() { return SampleDataTwo; } }; class Derived1 : public Base1, public Base2 { int MyData; public: Derived1() { MyData = 300; } ~Derived1() { } int MyFunct() { return (MyData + SampleDataOne + SampleDataTwo); } }; int main() { Base1 SampleObjOne; Base2 SampleObjTwo; Derived1 SampleObjThree; cout << SampleObjThree.Base1 :: SampleFunctOne() << endl; cout << SampleObjThree.Base2 :: SampleFunctTwo() << endl; return 0; }”. This question is standard in competitive examination syllabi for Inheritance In C Plus Plus.

Both Dynamic binding & Polymorphism is the correct answer to “Which of the following advantages we lose by using multiple inheritances”. This question is standard in competitive examination syllabi for Inheritance In C Plus Plus.

Error is the correct answer to “What will be the output of the following C++ code? #include <iostream> #include <string> using namespace std; class A { int a; public: A(){ a = 0; } void show(){ a++; cout<<"a: "<<a<<endl; } }; class B: private A { public: }; int main(int argc, char const *argv[]) { B b; b.show(); return 0; }”. This question is standard in competitive examination syllabi for Inheritance In C Plus Plus.

All the functions which are declared in the base class and is re-defined/overridden by the derived class is the correct answer to “What is a virtual function in C++”. This question is standard in competitive examination syllabi for Inheritance In C Plus Plus.

1510 is the correct answer to “What will be the output of the following C++ code? #include <iostream> #include <string> using namespace std; class A { float d; public: int a; void change(int i){ a = i; } void value_of_a(){ cout<<a; } }; class B: public A { int a = 15; public: void print(){ cout<<a; } }; int main(int argc, char const *argv[]) { B b; b.change(10); b.print(); b.value_of_a(); return 0; }”. This question is standard in competitive examination syllabi for Inheritance In C Plus Plus.

I'm a Human is the correct answer to “What will be the output of the following C++ code? #include <iostream> #include <string> using namespace std; class Mammal { public: virtual void Define(){ cout<<"I'm a Mammal\n"; } }; class Human: public Mammal { private: void Define(){ cout<<"I'm a Human\n"; } }; int main(int argc, char const *argv[]) { Mammal *M = new Mammal(); Human H; M = &H; M->Define(); return 0; }”. This question is standard in competitive examination syllabi for Inheritance In C Plus Plus.

Polymorphism is the correct answer to “Which concept of OOPs is shown by Virtual Functions”. This question is standard in competitive examination syllabi for Inheritance In C Plus Plus.

late binding is the correct answer to “Virtual functions in C++ tells the compiler to perform . . . . . . . . on such functions.”. This question is standard in competitive examination syllabi for Inheritance In C Plus Plus.

both late binding and dynamic linkage is the correct answer to “The concept of deciding which function to invoke during runtime is called . . . . . . . .”. This question is standard in competitive examination syllabi for Inheritance In C Plus Plus.

Destructor of B followed by A is the correct answer to “What is the order of Destructors call when the object of derived class B is declared, provided class B is derived from class A”. This question is standard in competitive examination syllabi for Inheritance In C Plus Plus.

12 is the correct answer to “What will be the output of the following C++ code? #include <iostream> #include <string> using namespace std; class A { int a, b; float d; public: void change(int i){ a = i; } void value_of_a(){ cout<<a; } }; class B: private A { }; int main(int argc, char const *argv[]) { B b; cout<<sizeof(B); return 0; }”. This question is standard in competitive examination syllabi for Inheritance In C Plus Plus.

All of the mentioned is the correct answer to “What are the things are inherited from the base class”. This question is standard in competitive examination syllabi for Inheritance In C Plus Plus.

Constructor of A followed by B is the correct answer to “What is the order of Constructors call when the object of derived class B is declared, provided class B is derived from class A”. This question is standard in competitive examination syllabi for Inheritance In C Plus Plus.

20 10 is the correct answer to “What will be the output of the following C++ code? #include <iostream> using namespace std; class polygon { protected: int width, height; public: void set_values (int a, int b) { width = a; height = b;} }; class output1 { public: void output (int i); }; void output1::output (int i) { cout << i << endl; } class rectangle: public polygon, public output1 { public: int area () { return (width * height); } }; class triangle: public polygon, public output1 { public: int area () { return (width * height / 2); } }; int main () { rectangle rect; triangle trgl; rect.set_values (4, 5); trgl.set_values (4, 5); rect.output (rect.area()); trgl.output (trgl.area()); return 0; }”. This question is standard in competitive examination syllabi for Inheritance In C Plus Plus.

Comma is the correct answer to “Which symbol is used to create multiple inheritances”. This question is standard in competitive examination syllabi for Inheritance In C Plus Plus.

3 is the correct answer to “How many specifiers are used to derive a class”. This question is standard in competitive examination syllabi for Inheritance In C Plus Plus.

all the members are inherited by the class but are hidden and cannot be accessible is the correct answer to “If a class is derived privately from a base class then . . . . . . . .”. This question is standard in competitive examination syllabi for Inheritance In C Plus Plus.

Deriving a derived class from more than one base class is the correct answer to “What is meant by multiple inheritance”. This question is standard in competitive examination syllabi for Inheritance In C Plus Plus.