Vorto Senior Android Developer interview questions

Applied on LinkedIn through a staffing agency and get the first round of interview after 3 weeks ,asked about what do I like about their nutrition facts and then they gave a challenge to build Yelp clone , after I spent all my time building the app and submitting it they said they already hired another candidate what a joke it is , pure waste of my time if they are so particular about they nutrition facts they should probably follow them before trying to interview other candidates