Online C++ Test Questions

[heidiK]

Hello Everyone, I recently gave an online C++ test. Below are few of the questions I need help with. Could anyone please explain to me the correct answers?

1) Can we call virtual function from non-virtual function?
2) Can we call pure virtual function from constructor?
3) Benefits of Templates over overriding

i)	One copy of code in memory
ii)	Fast

4) Obj1 = obj2 points to the same memory location?
5) Rough Code below

Class Object1; (no object created)
Class Object2 obj2; (one object created)
cout << dynamic_cast< Object1>(obj2) << endl; ....... prints what?

6) How to find a substring in a map key (syntax?), the key stores a string.
7) Returning an array from function (syntax of function signature?)
8) Default copy constructor does what

i)	Reference to the original object of the same class
ii)	Does nothing by default

9) Assign const pointer to a non-const pointer

i)	Reinterpret
ii)	Dynamic_cast
iii)	Const_cast
iv)	Static_cast

10) If we do not write a constructor, the compiler generates one for us. Is there a default destructor too?
11) How to print vector elements in a separate function having only a print statement

Rough Code
For_each(syntax for iteratring, printFunc) – syntax?????
For() {}  – syntax?????
int printFunc(int i)
{cout << i << endl;}

12) What does double ( ## ) between two variables and single ( # ) before one variable in macros mean?
e-g ... {#xyz ## #jkl}
13)

Rough Code
Pointer1 ptr1 = new Pointer;
Pointer2 ptr2;
ptr2 = ptr1; ..... how to assign? Syntax

[LB]

Have you read the C++ Tutorial on this site? It covers nearly everything in those questions and even in roughly the same order.