I applied in-person. The process took 2 days. I interviewed at 3dplm Software Solution (Pune) in Aug 2013
Interview
It's a 3 stage interview. 2 a technical 1 is hr. The technical focuses on geometric reasoning. Some of it is related to solid modeling skills. But mostly geometric reasoning. Few puzzles too. Mostly related to engineering graphics and its reasoning. Both the interviews have similar questions. HR interview is mostly small and pretty formal.
Interview questions [1]
Question 1
Questions related to creating orthoghapic and isometric drawings from difficult images.