Interview test for applied scientific computing job [closed]

Question

Do you know a good and objective question/test to examine applicants for a scientific computing job?

(In fact, this test comes after the candidate passed an interview.)

1st) They need to be intelligent. (Edit, thanks for the words from Trent)

2nd) They would have to deal mostly with programming (C++ and Python, using scientific libraries), numerics and mathematics, but also with engineering and physics topics. Also, C-like or Fortran-like style is not desired... usage of O.O. concepts would be good.

The applicant may have access to compilers, tools, libraries and internet. The duration of the test should be no more than 4 hours.

Answer 1

Find intelligent people and they will be able to adapt to your specific requirements. This is much better than trying to find someone who meets all you "check boxes".