Answer keeping in mind the rules of image formation by the lens:

 In case of a _______, the ray appears to diverge from the principal focus located on the same side of the lens. 

After refraction by a convex lens, a beam of light from the object travelling parallel to the principal axis passes through the principal focus on the other side of the lens. When the lens is concave, the light beam parallel to principal axis seems to diverge from the principal focus which is on the same side of the lens.