C++ interview questions part 47
C++ interview questions part 47
Take as many assements as you can to improve your validate your skill rating
Total Questions: 20
1. What is the output of the folowing C++ code?
#include
#include
using namespace std;
int main()
{
vector v;
for (int i = 1; i <= 5; i++)
v.push_back(i);
cout<
Correct Answer is : It will not have a destructor
Correct Answer is : It will not have a destructor
2. What will be the capacity of the vector after 10 is pushed into the vector in the following C++ code?
#include
#include
using namespace std;
int main()
{
vector v;
for (int i = 1; i <= 5; i++)
v.push_back(i);
cout<
Correct Answer is : I only
Correct Answer is : I only
3. What will be the capacity of vector at the end in the following C++ code?
#include
#include
using namespace std;
int main()
{
vector v;
for (int i = 1; i <= 5; i++)
v.push_back(i);
v.reserve(50);
cout<
Correct Answer is : Private
Correct Answer is : Private
4. What is the output of the following C++ code?
#include
#include
using namespace std;
int main()
{
vector v;
for (int i = 1; i <= 5; i++)
v.push_back(i);
int *pos = v.data();
cout<<*(pos + 3);
return 0;
}
Correct Answer is : All of the mentioned
5. What is the output of the following C++ code?
#include
#include
using namespace std;
int main()
{
vector v;
for (int i = 1; i <= 5; i++)
v.push_back(i);
cout<
Correct Answer is : Structures can have member functions
Correct Answer is : Structures can have member functions
6. What is the output of the following C++ code?
#include
#include
using namespace std;
int main()
{
vector v;
for (int i = 1; i <= 5; i++)
v.push_back(i);
for(int i=0;i
Correct Answer is : By declaring a pure virtual function in a class
Correct Answer is : By declaring a pure virtual function in a class
7. Which function is used to swap two vectors?
Correct Answer is : An object is an instance of its class
8. What is the output of the following C++ code?
#include
#include
using namespace std;
int main()
{
vector v1;
vector v2;
for (int i = 1; i <= 5; i++)
v1.push_back(i);
for (int i = 6; i <= 10; i++)
v2.push_back(i);
v1.swap(v2);
for(int i=0;i
Correct Answer is : Pointer object initialization of a class using new involves constructor call whereas using malloc does not involve constructor call
Correct Answer is : Pointer object initialization of a class using new involves constructor call whereas using malloc does not involve constructor call
9. What is the output of the following C++ code?
#include
#include
using namespace std;
int main()
{
vector v1;
vector v2;
for (int i = 1; i <= 5; i++)
v1.push_back(i);
for (int i = 6; i <= 10; i++)
v2.push_back(i);
v1.swap(v2);
for(int i=0;i
Correct Answer is : C++ technique to avoid multiple copies of the base class into children/derived class
Correct Answer is : C++ technique to avoid multiple copies of the base class into children/derived class
10. What do container adapter provide to interface?
Correct Answer is : delete is used to delete single object whereas delete[] is used to multiple(array/pointer of) objects
11. What does the sequence adaptor provide?
Correct Answer is : Segmentation fault
12. Which are presented in the container adaptors?
Correct Answer is : “Constructor called” five times and then “Destructor called” five times
13. In which context does the stack operates?
Correct Answer is : The program is compiled and executed successfully
14. Which operator is used in priority queue?
Correct Answer is : Undefined behaviour
15. How many items are there in sequence container?
Correct Answer is : operator overloading
16. Which of the following class template are based on arrays?
Correct Answer is : ::
17. Which of the following will return the new element at the end of container?
Correct Answer is : operator sign
18. How the list containers are implemented?
Correct Answer is : adding operation to the existing operators
19. Which of the following does not support any insertion or deletion?
Correct Answer is : error
20. What kind of iteration does forward_list provide in C++?
Correct Answer is : No output
