Questions and Answers

Questions and Answers

Easy Questions

C++ Programming

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Questions and Answers
Standard Library
  1. Which of the following does not support any insertion or deletion?










  1. View Hint View Answer Discuss in Forum

    NA

    Correct Option: C

    Because array is not dynamic in nature, So they can’t be manipulated.

  1. How the list containers are implemented?










  1. View Hint View Answer Discuss in Forum

    NA

    Correct Option: B

    List containers are implemented as doubly-linked lists. Doubly linked lists can store each of the elements they contain in different and unrelated storage locations.

  1. What is the output of this program?
    #include <iostream>
        #include <vector>
        using namespace std;
        int main ()
        {
            vector<int> Data;
            Data.assign (5,50);
            vector<int>::iterator iter;
            iter=Data.begin()+1;
            int Array[] = {1200,20,40};
            cout << int (Data.size()) << '\n';
            return 0;
        }










  1. View Hint View Answer Discuss in Forum

    NA

    Correct Option: A

    In this program, We are finding the size of the vector elements and resizing it.

  1. What is the output of this program?
    #include <iostream>
        #include <vector>
        using namespace std;
        int main ()
        {
            vector<int> VectorData;
            int * ptr;
            unsigned int k;
            ptr = VectorData.get_allocator().allocate(6);
            for (k = 0; k < 6; k++) 
                VectorData.get_allocator().construct(&ptr[k], k);
            for (k = 0; k < 6; k++)
                cout << ' ' << ptr[k];
            for (k = 0; k < 6; k++)
                VectorData.get_allocator().destroy(&ptr[k]);
            VectorData.get_allocator().deallocate(ptr, 6);
            return 0;
        }










  1. View Hint View Answer Discuss in Forum

    NA

    Correct Option: E

    In this program, We allocated the values to the vector by using get allocater and then we are destroying it.

  1. What is the output of this program?
    #include <iostream>
        #include <deque>
        using namespace std;
        int main ()
        {
            unsigned int k;
            deque<int> DequeData;
            DequeData.push_back (50);
            DequeData.push_back (75);
            DequeData.push_back (90);
            for(deque<int> :: iterator iter = DequeData.begin(); iter != DequeData.end(); ++iter)
            {
            }
            DequeData.clear();
            DequeData.push_back (150);
            DequeData.push_back (175);
            for(deque<int> :: iterator iter = DequeData.begin(); iter != DequeData.end(); ++iter)
                cout << ' ' << *iter;
            cout << '\n';
            return 0;
        }










  1. View Hint View Answer Discuss in Forum

    NA

    Correct Option: D

    In this program, We cleared the old values presented in the dequeue with the new values.