microdrones Junior Android Developer interview questions

I applied online and interviewed at Microdrones in Oct-18. The process took 4 weeks. First it was a Skype interview with company's Lead Android Developer and he asked about company's goal and asked me about my background. Next step was Coding test which he mailed me and was given with parameters and drone specifications to calculate whether drone can complete mission. Final round was at their location in Vaudreuil-Dorion, Quebec. I met team and nothing difficult. Some behavioral questions. I did not hear from them and when I followed up they said they have hired another candidate.