C++ interview questions part 37
C++ interview questions part 37
Take as many assements as you can to improve your validate your skill rating
Total Questions: 20
1. Which of the following is an abstract data type?
Correct Answer is : 14
2. Which concept means the addition of new components to a program as it runs?
Correct Answer is : 311
3. Which of the following explains the overloading of functions?
Correct Answer is : Pre Increment is faster than post-increment
4. Which of the following approach is used by C++?
Correct Answer is : call by reference
5. Which operator is overloaded for a cout object?
Correct Answer is : Deriving new classes from existing classes
6. Which of the following cannot be used with the virtual keyword?
Correct Answer is : 3
7. Which concept is used to implement late binding?
Correct Answer is : private
8. Which of the following supports the concept that reusability is a desirable feature of a language?
Correct Answer is : all the members are inherited by the class but are hidden and cannot be accessible
9. Which of the following is a static polymorphism mechanism?
Correct Answer is : 12
10. Which of the following is true? I) All operators in C++ can be overloaded. II) The basic meaning of an operator can be changed.
Correct Answer is : 1510
11. What happens if a class does not have a name?
Correct Answer is : All the functions which are declared in the base class and is re-defined/overridden by the derived class
12. Which of the following statement is true? I) In Procedural programming languages, all function calls are resolved at compile-time II) In Object Oriented programming languages, all function calls are resolved at compile-time
Correct Answer is : virtual int func();
13. Which members are inherited but are not accessible in any case?
Correct Answer is : Segmentation Fault
14. Which of the following is correct in C++?
Correct Answer is : Hello this is class B
15. Which of the following is used to make an abstract class?
Correct Answer is : They are used to hide objects
16. Which is the following is correct about new and malloc?
Correct Answer is : both late binding and dynamic linkage
17. What is virtual inheritance?
Correct Answer is : A virtual function that has no definition relative to the base class
18. What is the output of the following C++ code?
#include
using namespace std;
class A{
public:
A(){
cout<<"Constructor called\n";
}
~A(){
cout<<"Destructor called\n";
}
};
int main(int argc, char const *argv[])
{
A *a = new A[5];
delete a;
return 0;
}
Correct Answer is : Constructor of A followed by B
19. What is the output of the following C++ code?
#include
using namespace std;
class A{
public:
A(){
cout<<"Constructor called\n";
}
~A(){
cout<<"Destructor called\n";
}
};
int main(int argc, char const *argv[])
{
A *a = new A[5];
delete[] a;
return 0;
}
Correct Answer is : Destructor of B followed by A
20. What is the output of the following?
#include
using namespace std;
class Base {
public:
Base()
{ cout<<"Constructing Base \n"; }
~Base()
{ cout<<"Destructing Base \n"; }
};
class Derived: public Base {
public:
Derived()
{ cout<<"Constructing Derived \n"; }
~Derived()
{ cout<<"Destructing Derived \n"; }
};
int main(void)
{
Derived *d = new Derived();
Base *b = d;
delete b;
return 0;
}
Correct Answer is : Segmentation Fault
