To use the strlen function in a program, you must also write #include ________.

The header file is also known as the ____________________.

C++ provides a header file called ____________________, which is used for file i/o.

Before using the data type string, the program must include the header file ____.

The standard header file for the abs(x)function is ____.

The function eof is a member of the data type ____________________.

std::function<int()> f; f(); f is not initialized. What exception is thrown, when you try to call it?

Given this code, what is the output? #include struct shape { void move() { std::cout << 'shape::move\n'; } }; struct circle : public shape { void move() { std::cout << 'circle::move\n'; } }; struct rectangle : public shape { void move() { std::cout << 'rectangle::move\n'; } }; int main() { shape *s; s = new shape(); s->move(); s = new circle(); s->move(); s = new rectangle(); s->move(); return 0; }

const std::string * s; std::string const * g; What can be said about s and g?

Which of the following operators can you not overload?

Output of the following C++ code ? #include class A { int a; public: void foo() {std::cout<<'foo';} }; int main() { A* trial=nullptr; trial->foo(); }