It is difficult to understand what you mean by "correct" answer, especially when we are discussing a "not-geometrically-optimized configuration" as you have called it, so I will try to go through the principles.
This matrix of all possible second derivatives of the energy with respect to the nuclear displacements of the atoms in your structure is referred to as the Hessian matrix. The Hessian can be diagonalized to obtain harmonic force constants, vibrational frequencies, and normal modes.
The vibrational frequencies of the normal modes and the eigenvectors give the amplitudes of motion along each the mass-weighted Cartesian coordinates that belong to each mode. If this same kind of analysis were performed at a geometry corresponding a "not-geometrically-optimized configuration" you would get negative modes which would essentially characterize a "downward" curvature of the energy surface. There is a peculiar case when you have exactly one negative mode, this would usually correspond to a transition state in a configuration or reaction analysis. Here is a good reference on this :
Finally, this means that if you do your calculations on your proposed non-optimized structure, you would get several negative frequencies. Does that make them correct or incorrect ? They would technically be correct for that structure itself. However, the structure itself is non-optimized. So maybe the best answer would be that the values are correct but have no real scientific value.
Another good reference :