C++ List Container Aptitude Questions and Answers

1) There are the following statements that are given below, which of them are correct about list container in C++?

1. A list container class is a derived container.
2. The list supports bi-directional iteration.
3. The list stores elements in the contiguous memory location.
4. The traversing of the list element is slow compared to the vector.

Options:

1. A and B
2. A, B, and C
3. B, C, and D
4. A, B, C, and D

2) Which of the following header file is required to use list container class in C++?

1. <list>
2. <List>
3. <Ilist>
4. <Linkedlist>

3) Can we access elements from the list randomly?

1. Yes
2. No

4) What is the correct output of given code snippets in C++?

#include <iostream>
#include <list>
using namespace std;

int main()
{
    list<int> L;

    L.push_back(10);
    L.push_back(20);

    for (int i = 0; i < L.size(); i++) {
        cout << L[i] << " ";
    }

    return 0;
}

Options:

1. 10 20
2. Garbage value
3. Syntax error
4. Runtime error

5) What is the correct output of given code snippets in C++?

#include <iostream>
#include <list>
using namespace std;

int main()
{
    list<int> L;

    L.push_back(10);
    L.push_back(20);

    for (int i = 0; i < L.size(); i++) {
        cout << *L++ << " ";
    }

    return 0;
}

Options:

1. 10 20
2. 20 10
3. Syntax error
4. Runtime error

6) What is the correct output of given code snippets in C++?

#include <iostream>
#include <list>
using namespace std;

int main()
{
    list<int> L;
    list<int>::iterator I;

    L.push_back(10);
    L.push_back(20);

    for (I = L.begin(); I != L.end(); ++I)
        cout << *I << " ";

    return 0;
}

Options:

1. 10 20
2. 20 10
3. Syntax error
4. Runtime error

7) What is the correct output of given code snippets in C++?

#include <iostream>
#include <list>
using namespace std;

int main()
{
    list<int> L;
    list<int>::iterator I;

    L.push_back(10);
    L.push_back(20);

    for (I = L.begin(); I != L.end();)
        cout << *++I << " ";

    return 0;
}

Options:

1. 10 20
2. 20 10
3. Syntax error
4. Runtime error

8) What is the correct output of given code snippets in C++?

#include <iostream>
#include <list>
using namespace std;

int main()
{
    list<int> L;
    list<int>::iterator I;

    L.push_back(10);
    L.push_back(20);

    for (I = L.begin(); I != L.end();)
        cout << *++I++ << " ";

    return 0;
}

Options:

1. 10 20
2. 20 10
3. Syntax error
4. Runtime error

9) What is the correct output of given code snippets in C++?

#include <iostream>
#include <list>
using namespace std;

int main()
{
    list<int> L;
    list<int>::iterator I;

    L.push_back(10);
    L.push_back(20);

    for (I = L.begin(); I != L.end();)
        cout << *I++ << " ";

    return 0;
}

Options:

1. 10 20
2. 20 10
3. Syntax error
4. Runtime error

10) What is the correct output of the given code snippet?

#include <iostream>
#include <list>
using namespace std;

int main()
{
    list<int> L;
    list<int>::iterator I;

    L.push_back(10);
    L.push_back(20);
    L.push_front(30);
    L.push_back(40);

    L.pop_back();
    L.pop_back();

    cout << L.front();

    return 0;
}

Options:

1. 10
2. 20
3. 30
4. 40

11) What is the correct output of the given code snippets?

#include <iostream>
#include <list>
using namespace std;

int main()
{
    list<int> L;
    const list<int>::iterator I;

    L.push_back(10);
    L.push_back(20);
    L.push_back(30);
    L.push_back(40);

    for (I = L.begin(); I != L.end();)
        cout << *I++ << " ";

    return 0;
}

Options:

1. 10 20 30 40
2. 40 30 20 10
3. Syntax error
4. Runtime error

12) What is the correct output of given code snippets?

#include <iostream>
#include <list>
using namespace std;

int main()
{
    list<int> L;
    list<int>::iterator I;

    L.push_back(10);
    L.push_back(20);
    L.push_back(30);
    L.push_back(40);

    L.reverse();

    for (I = L.begin(); I != L.end();)
        cout << *I++ << " ";

    return 0;
}

Options:

1. 10 20 30 40
2. 40 30 20 10
3. Syntax error
4. Runtime error

13) What is the correct output of given code snippets?

#include <iostream>
#include <list>
using namespace std;

int main()
{
    list<string> L;
    list<string>::iterator I;

    L.push_back("India ");
    L.push_back("is ");
    L.push_back("great ");
    L.push_back("country ");

    I.reverse();

    for (I = L.begin(); I != L.end();)
        cout << *I++ << " ";

    return 0;
}

Options:

1. India is great country
2. country great is India
3. Syntax error
4. Runtime error

14) What is the correct output of the given code snippets?

#include <iostream>
#include <list>
using namespace std;

int main()
{
    list<int> L1;
    list<int> L2;

    list<int>::iterator I;

    L1.push_back(10);
    L1.push_back(20);

    L2.push_back(30);
    L2.push_back(40);

    L1.merge(L2);

    for (I = L2.begin(); I != L2.end(); ++I)
        cout << *I << " ";

    return 0;
}

Options:

1. 10 20 30 40
2. 40 30 20 10
3. No output
4. Syntax error

15) What is the correct output of the given code snippets?

#include <iostream>
#include <list>
using namespace std;

int main()
{
    list<int> L1;
    list<int> L2;

    list<int>::iterator I;

    L1.push_back(10);
    L1.push_back(20);

    L2.push_back(30);
    L2.push_back(40);

    L1.merge(L2);

    for (I = L1.begin(); I != L1.end(); ++I)
        cout << *I << " ";

    return 0;
}

Options:

1. 10 20 30 40
2. 40 30 20 10
3. Syntax error
4. No output

16) What is the correct output of given code snippets in C++?

#include <iostream>
#include <list>
using namespace std;

int main()
{
    list<int> L;
    list<int>::iterator I;

    L.push_back(10);
    L.push_back(40);
    L.push_back(30);
    L.push_back(20);

    L.sort(1);

    for (I = L.begin(); I != L.end();)
        cout << *I++ << " ";

    return 0;
}

Options:

1. 10 20 30 40
2. 40 30 20 10
3. No output
4. Syntax error

17) What is the correct output of given code snippets in C++?

#include <iostream>
#include <list>
using namespace std;

int main()
{
    list<int> L;
    list<int>::iterator I;

    L.push_back(10);
    L.push_back(40);
    L.push_back(30);
    L.push_back(20);

    L.sort();
    L.reverse();

    for (I = L.begin(); I != L.end();)
        cout << *I++ << " ";

    return 0;
}

Options:

1. 10 20 30 40
2. 40 30 20 10
3. No output
4. Syntax error

18) What is the correct output of given code snippets in C++?

#include <iostream>
#include <list>
using namespace std;

int main()
{
    list<int> L;
    list<int>::iterator I;

    L.push_back(10);
    L.push_back(40);
    L.push_back(10);
    L.push_back(20);
    L.push_back(20);

    cout << L.unique();

    return 0;
}

Options:

1. 0
2. 40
3. Syntax error
4. Runtime error

19) What is the correct output of given code snippets in C++?

#include <iostream>
#include <list>
using namespace std;

int main()
{
    list<int> L;
    list<int>::iterator I;

    L.push_back(10);
    L.push_back(40);
    L.push_back(10);
    L.push_back(20);
    L.push_back(20);
    L.push_back(40);

    L.unique();

    for (I = L.begin(); I != L.end();)
        cout << *I++ << " ";

    return 0;
}

Options:

1. 10 40 20
2. 10 40 10 20 40
3. Syntax error
4. Runtime error

20) What is the correct output of given code snippets in C++?

#include <iostream>
#include <list>
using namespace std;

int main()
{
    list<int> L;
    list<int>::iterator I;

    L.push_back(10);
    L.push_back(40);
    L.push_back(10);
    L.push_back(20);
    L.push_back(20);
    L.push_back(40);

    L.unique();
    L.sort();

    for (I = L.begin(); I != L.end();)
        cout << *I++ << " ";

    return 0;
}

Options:

1. 10 20 40
2. 10 10 20 40 40
3. Syntax error
4. Runtime error

21) What is the correct output of the given code snippets?

#include <iostream>
#include <list>
using namespace std;

int main()
{
    list<int> L;
    list<int>::iterator I;

    L.push_back(10);
    L.push_back(40);
    L.push_back(10);
    L.push_back(20);
    L.push_back(20);
    L.push_back(40);

    L.sort();
    L.unique();

    for (I = L.begin(); I != L.end();)
        cout << *I++ << " ";

    return 0;
}

Options:

1. 10 20 40
2. 10 10 20 40 40
3. Syntax error
4. Runtime error

22) What is the correct output of given code snippets in C++?

#include <iostream>
#include <list>
using namespace std;

int main()
{
    list<int> L;
    list<int>::iterator I;

    L.push_back(10);
    L.push_back(20);
    L.push_back(30);
    L.push_back(40);

    L.assign(2, 12);

    for (I = L.begin(); I != L.end();)
        cout << *I++ << " ";

    return 0;
}

Options:

1. 10 20 12 12 30 40
2. 12 12
3. Syntax error
4. Runtime error

23) What is the correct output of given code snippets in C++?

#include <iostream>
#include <list>
using namespace std;

int main()
{
    list<int> L;
    list<int>::iterator I;

    L.push_back(10);
    L.push_back(20);
    L.push_back(30);
    L.push_back(40);

    L.resize(3);

    for (I = L.begin(); I != L.end();)
        cout << *I++ << " ";

    return 0;
}

Options:

1. 10 20 30 40
2. 10 20 30
3. Syntax error
4. Runtime error

24) What is the correct output of given code snippets in C++?

#include <iostream>
#include <list>
using namespace std;

int main()
{
    list<int> L;
    list<int>::iterator I;

    L.push_back(10);
    L.push_back(20);
    L.push_back(30);
    L.push_back(40);

    L.resize(3);
    L.resize(4);
    for (I = L.begin(); I != L.end();)
        cout << *I++ << " ";

    return 0;
}

Options:

1. 10 20 30 40
2. 10 20 30 30
3. 10 20 30 0
4. Syntax error

25) What is the correct output of given code snippets in C++?

#include <iostream>
#include <list>
using namespace std;

int main()
{
    list<int> L1;
    list<int> L2;
    list<int>::iterator I;

    L1.push_back(10);
    L1.push_back(20);

    L2.push_back(30);
    L2.push_back(40);

    I = L1.begin();

    L1.splice(I, L2);

    for (I = L1.begin(); I != L1.end();)
        cout << *I++ << " ";

    return 0;
}

Options:

1. 10 20 30 40
2. 30 40 10 20
3. 40 30 20 10
4. Syntax error