C++ Interview

Questions to apply for C++ position:

1.  What will this method return ?

const char* getWhenToDoSomething()
  {
     string aziTodo("today");
     return aziTodo.c_str();
  }

2.  And this beautiful code, what will he print ?

 char *ptr = new char[6];
 strcpy(ptr, "12345");
 int *x = (int*)ptr;
 x += 1;
 char* ptr2 = (char*)x;
 std::cout << *ptr2 << std::endl;

  Tip: after casting from char to int, increment step will be bigger

    Next be 3 dragons. They they will ask MATH. 
        While hard stuff,
             use Google search when necessary.

3.   Write a class for Complex numbers.
   Also choose a solution for the fact that there can be two constructors :

   Complex(double realNumber, double imaginaryNumber)
   Complex(double angle, double absoluteValue)

          both taking 2 double arguments as parameters,

             what is the solution to take care of both constructors ?

4.   Write the method to return the Taylor exponential function for x.

    The same as the std::exp(double x) function. Provide the code to calculate the sum, the Taylor series sum( 1+ x + ...) and do not call std::exp(just maybe in assert to verify results).

5.   Final level: Euler's formula.
   Use both solutions from exercise 3. and 4. to calculate e to power i*x.
   Assert that the result is equal to cos(x) + i*sin(x)

                                  5 levels done, 

                                         next act will touch the map,

                                                     Bogdan Nicolae Visoiu

                                                         GL HF