C++ miscellaneous
practice.

What will be the output of the following C++ code?

#include <iostream>
#include <Valarray>
using namespace std;
int main()
{
	Valarray<int> varr = { 1, 2, 3, 4, 5 };
	for (int &x: varr) cout << x << " ";
	cout<<endl;
	varr = varr.shift(2);
	for (int &x: varr) cout << x << " ";
	return 0;
}

What function will be called when we have an uncaught exception?

What will be the output of the following C++ code?

#include <iostream> 
#include <vector> 
#include <forward_list>  
 
using namespace std; 
 
int main() 
{ 
    forward_list<int> fl1 = {1,2,3,4,5};
    for (int&c : fl1)  
        cout << c << " ";
    cout<<endl;
    fl1.remove_if([](int x){ return x > 3;});
    for (int&c : fl1)  
        cout << c << " ";
    cout<<endl;
    return 0; 
}

What will be the output of the following C++ code?

#include <iostream>
#include <valarray>
using namespace std;
int main()
{
	valarray<int> varr = { 10, 2, 20, 1, 30 };
	cout<<"Sum of array: "<<varr.sum();
	return 0;
}

What will be the output of the following C++ code?

#include <iostream>
using namespace std;
class Base
{
    public:
    Base ( )
    {
        cout << "1" << endl;
    }
    ~Base ( )
    {
        cout << "2" << endl;
    }
};
class Derived : public Base
{
    public:
    Derived  ( )
    {
        cout << "3" << endl;
    }
    ~Derived ( )
    {
        cout << "4" << endl;
    }    
}; 
int main( )
{
    Derived x;
}

What will be the output of the following C++ code?

#include <iostream>
#include <bitset>
using namespace std;
int main()
{
	bitset<8> b1(95);
	bitset<8> b2 = b1 << 3;
	cout<<b2;
}

What is the main feature of locale in C++?

Elements in STL heap are removed in . . . . . . . .

What will be the output of the following C++ code?

#include <iostream>
#include <algorithm>
#include <vector>
using namespace std;
int main () 
{
    vector<int> myvector;
    for (int i = 1; i < 5; ++i)
        myvector.push_back(i);
    rotate(myvector.begin(), myvector.begin() + 3, myvector.end( ));
    for (vector<int> :: iterator it = myvector.begin(); 
        it != myvector.end(); ++it)
    cout << ' ' << *it;
    return 0;
}

What are command line arguments?

How many parameters are there in getline function?

Which of the following relationships is uni-directional?

What will be the output of the following C++ code?

#include <iostream>
using namespace std;
int main()
{
    int a = 10;
    if (a < 15)
    {
        time:
        cout << a;
        goto time;
    }
    break;
    return 0;
}

Which is used to create a pure virtual function?

What will be the output of the following C++ code?

#include <iostream>
#include <string>
using namespace std;
int main ()
{
    int num = 3;
    string str_bad = "wrong number used";
    try
    {
        if ( num == 1 )
        {       
            throw 5;
        }
        if ( num == 2 )
        {
            throw 1.1f;
        }
        if ( num != 1 || num != 2 )
        {    
            throw str_bad;
        }
    }
    catch (int a)
    {
        cout << "Exception is: " << a << endl;
    }
    catch (float b)
    {
        cout << "Exception is: " << b << endl;
    }
    catch (...)
    {
        cout  << str_bad << endl;
    }
    return 0;
}

Which of the following function is used to insert an element at the end of a vector?

What are the tuples in C++?

How many ways of reusing are there in the class hierarchy?

Which header file is used for the numeric limits in C++?

What will be the output of the following C++ code?

#include <iostream>
#include <string>
#include <tuple>
using namespace std;
int main()
{
	tuple <int, char, string> tp1;
	tuple <int, char, string> tp2;
	tp1 = make_tuple(6, 'a', "Hello");
	tp2 = make_tuple(9, 'z', "World");
	cout<<"("<<get<0>(tp1)<<", "<<get<1>(tp1)<<", "<<get<2>(tp1)<<")"<<endl;
	cout<<"("<<get<0>(tp2)<<", "<<get<1>(tp2)<<", "<<get<2>(tp2)<<")"<<endl;
	tp1.swap(tp2);
	cout<<"("<<get<0>(tp1)<<", "<<get<1>(tp1)<<", "<<get<2>(tp1)<<")"<<endl;
	cout<<"("<<get<0>(tp2)<<", "<<get<1>(tp2)<<", "<<get<2>(tp2)<<")"<<endl;
	return 0;
}