C++ interview questions part 30
C++ interview questions part 30
Take as many assements as you can to improve your validate your skill rating
Total Questions: 20
1. What will be output of this program?
#include using namespace std; int main() { int i = 3; int l = i / -2; int k = i % -2; cout << l << k; return 0; }
Correct Answer is : User interface
2. What will be output of this function? int main() { register int i = 1; int *ptr = &i; cout << *ptr; return 0; }
Correct Answer is : cout << “Hai” <<
3. What are Iterators?
Correct Answer is : int a = 5;
4. Which function is used increment the iterator by a particular value?
Correct Answer is : int main()
5. What is the output of the following C++ code?
#include
#include
#include
using namespace std;
int main()
{
vector ar = { 1, 2, 3, 4, 5 };
vector::iterator ptr = ar.begin();
advance(ptr, 2);
cout << *ptr << endl;
return 0;
}
Correct Answer is : setw
6. What is the output of the following C++ code?
#include
#include
#include
using namespace std;
int main()
{
vector ar = { 1, 2, 3, 4, 5 };
vector::iterator ptr = ar.begin();
ptr = advance(ptr, 2);
cout << *ptr << endl;
return 0;
}
Correct Answer is : 41275
7. What is the output of the following C++ code?
#include
#include
#include
using namespace std;
int main()
{
vector ar = { 1, 2, 3, 4, 5 };
vector::iterator ptr = ar.begin();
ptr = next(ptr, 3);
cout << *ptr << endl;
return 0;
}
Correct Answer is : 64100
8. How many types of Iterators are there?
Correct Answer is : Indicate the base used
9. Which of the following is correct about Input Iterators?
Correct Answer is : Freestore
10. What type of Iterator i1 is in the following C++ code snipet?
================ code ================
vector::iterator i1;
for (i1=v1.begin();i1!=v1.end();++i1)
*i1 = 1;
======================================
Correct Answer is : both new & delete
11. If i1 is Input Iterator and i2 is Output Iterator, then which of the following things are correct? i) cout<<*i1; ii) i2 can be used with == operator iii) *i1 = 1 iv) i2--
Correct Answer is : static
12. Which of the following is an advantage of Forward iterator over input and output iterator?
Correct Answer is : B::operator delete
13. What are Bi-directional iterators?
Correct Answer is : Warning
14. What are Random-access Iterators?
Correct Answer is : Both X::operator delete(void*) & Depends on the compiler
15. How many categories of iterators are there in c++?
Correct Answer is : Runtime error
16. Which of the following can serve as random-access iterator?
Correct Answer is : Segmentation fault
17. What kind of pattern is iterator pattern?
Correct Answer is : Pointer
18. In which type of semantics does c++ implements iterator?
Correct Answer is : error
19. By using which operator does point to next element is represent in iterator?
Correct Answer is : value of b is: 10
20. What is lambda expression in C++?
Correct Answer is : error
