Miscellaneous C++

Inline functions are useful when

#include<iostream> using namespace std; int x = 1; void fun() { int x = 2; { int x = 3; cout << ::x << endl; } } int main() { fun(); return 0; }

Predict the output of following C++ program #include<iostream> using namespace std; union A { int a; unsigned int b; A() { a = 10; } unsigned int getb() {return b;} }; int main() { A obj; cout << obj.getb(); return 0; }

Which of the following is true about inline functions and macros.

How can we make a C++ class such that objects of it can only be created using new operator? If user tries to create an object directly, the program produces compiler error.

Would destructor be called, if yes, then due to which vector? #include <iostream> #include <vector> using namespace std; class a { public : ~a() { cout << "destroy"; } }; int main() { vector <a*> *v1 = new vector<a*>; vector <a> *v2 = new vector<a>; return 0; }

#include<iostream> using namespace std; int x[100]; int main() { cout << x[99] << endl; }

#include<iostream> using namespace std; int main () { int cin; cin >> cin; cout << "cin" << cin; return 0; }

A member function can always access the data in __________ , (in C++)

Which of the following is not correct for virtual function in C++ ?

Which of the following is not correct (in C++) ? 1.Class templates and function templates are instantiated in the same way 2.Class templates differ from function templates in the way they are initiated 3.Class template is initiated by defining an object using the template argument 4.Class templates are generally used for storage classes

In C++, polymorphism requires:

Method over-riding can be prevented by using final as a modifier at ______

In C, what is the effect of a negative number in a field width specifier?