C++ miscellaneous MCQ question and answer with solution | C++ Programimg MCQs

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71.
What will be the output of the following C++ code?
#include <iostream>
#include <exception>
using namespace std;
void terminator()
{
    cout << "terminate" << endl;
}
void (*old_terminate)() = set_terminate(terminator);
class Botch 
{
    public:
    class Fruit {};
    void f() 
    {
        cout << "one" << endl;
        throw Fruit();
    }
    ~Botch() 
    {
        throw 'c'; 
    }
};
int main() 
{
    try 
    {
        Botch b;
        b.f();
    } 
    catch(...) 
    {
        cout << "inside catch(...)" << endl;
    }
}

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72.
What is the correct function prototype of () operator overloading?

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75.
What will be the output of the following C++ code?
#include <iostream>
#include <string>
using namespace std;
int main()
{
	cout<<extent<string[10][20][30], 0>::value;
	cout<<extent<string[10][20][30], 1>::value;
	cout<<extent<string[10][20][30], 2>::value;
	return 0;
}

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76.
What will be the output of the following C++ code?
#include <iostream>
using namespace std;
int main()
{
    char* ptr;
    unsigned long int Test = sizeof(size_t(0) / 3);
    cout << Test << endl;
    try
    {
        ptr = new char[size_t(0) / 3];
        delete[ ] ptr;
    }
    catch (bad_alloc &thebadallocation)
    {
        cout << thebadallocation.what() << endl;
    };
    return 0;
}

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77.
What will be the output of the following C++ code?
#include <iostream>
#include <exception>
using namespace std;
void myunexpected ()
{
    cout << "unexpected called\n";
    throw 0;
}
void myfunction () throw (int) 
{
    throw 'x';
}
int main () 
{
    set_unexpected (myunexpected);
    try 
    {
        myfunction();
    }
    catch (int) 
    {
        cout << "caught int\n";
    }
    catch (...)  
    { 
        cout << "caught other exception\n"; 
    }
    return 0;
}

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78.
What will be the output of the following C++ code?
#include <iostream>
using namespace std;
int main ()
{
    char first, second;
    cout << "Enter a word: ";
    first = cin.get();
    cin.sync();
    second = cin.get();
    cout << first << endl;
    cout << second << endl;
    return 0;
}

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79.
What will be the output of the following C++ code?
#include <iostream>
#include <vector>
using namespace std;
int main ()
{
    vector<int> myvector;
    int * p;
    unsigned int i;
    p = myvector.get_allocator().allocate(5);
    for (i = 0; i < 5; i++) 
        myvector.get_allocator().construct(&p[i], i);
    for (i = 0; i < 5; i++)
        cout << ' ' << p[i];
    for (i = 0; i < 5; i++)
        myvector.get_allocator().destroy(&p[i]);
    myvector.get_allocator().deallocate(p, 5);
    return 0;
}

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80.
What will be the output of the following C++ code?
#include <iostream>
using namespace std; 
int main()
{
    try
    {
        try
        {
            throw 20;
        }
        catch (char n)
        {
            cout << "Inner Catch\n";
        }
    }
    catch (int x)
    {
        cout << "Outer Catch\n";
    }
    return 0;
}

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