C++ interview questions part 3
C++ interview questions part 3
Take as many assements as you can to improve your validate your skill rating
Total Questions: 20
1. What if we define the below structure in C and C++?
Correct Answer is : Error
2. Which of the following is the scope resolution operator?
Correct Answer is : Segmentation fault
3. What is the output of the following C++ code?
#include
using namespace std;
int x = 1;
int main()
{
int x = 2;
{
int x = 3;
cout << ::x << endl;
}
return 0;
}
Correct Answer is : protected
4. What is the output of the following C++ code?
#include
using namespace std;
class A
{
~A(){
cout<<"Destructor called\n";
}
};
int main()
{
A a;
return 0;
}
Correct Answer is : The variable is visible to its block and to it’s derived class
5. What is the output of the following C++ code?
#include
using namespace std;
class A
{
~A(){
cout<<"Destructor called\n";
}
};
int main()
{
A *a1 = new A();
A *a2 = new A();
return 0;
}
Correct Answer is : Both Member data & Functions
6. What is the output of the following C++ code?
#include
using namespace std;
int x[100];
int main()
{
cout << x[99] << endl;
}
Correct Answer is : 3010
7. What is the output of the following C++ code?
#include
using namespace std;
int main ()
{
int cin;
cin >> cin;
cout << "cin: " << cin;
return 0;
}
Correct Answer is : Allocated
8. Which of the following operator has left to right associativity?
Correct Answer is : Identical results would be produced
9. Which of the following is accessed by a member function of a class?
Correct Answer is : Gates is 56 years old
10. What is the size of a character literal in C and C++?
Correct Answer is : Data accessed
11. What is the size of a character type in C and C++?
Correct Answer is : None of the mentioned
12. Which of the following is correct?
Correct Answer is : It allows the data member to change within a const member function
13. What happens if we run the below code in both C and C++?
#include
struct STRUCT
{
int a;
int func()
{
printf("HELLO THIS IS STRUCTURE\n");
}
};
int main()
{
struct STRUCT s;
s.func();
return 0;
}
Correct Answer is : Both Allocation & Deallocation of memory
14. What happens if we run the below code in both C and C++?
#include
struct STRUCT
{
int a = 5;
int func()
{
printf("%d\n", a);
}
};
int main()
{
struct STRUCT s;
s.func();
return 0;
}
Correct Answer is : Standard library
15. What happens if the below code is compiled on both C and C++?
#include
struct STRUCT
{
private:
int a;
};
int main()
{
printf("%d\n", (int)sizeof(struct STRUCT));
return 0;
}
Correct Answer is : 1 4 5 5
16. Which of the following is correct about this pointer in C++?
Correct Answer is : steve jobs
17. Which of the following operator is used with this pointer to access members of a class?
Correct Answer is : HaiHaiHai
18. Why this pointer is used?
Correct Answer is : free
19. How many types of polymorphism are there?
Correct Answer is : memory
20. What is the other name of compile-time polymorphism?
Correct Answer is : Reference to an element
