What is required to create an online store from scratch in Java?
Good time of day.
The task: create online store for physical store auto parts, the which is not own the database, and uses 4 different database vendors in the procurement prices. Also, you need to create application for popular mobile platforms funktsionalom the online store. Whether the choice of Java as the language for writing the kernel of the site, justified; is it possible to merge 4 different DB in the same directory with the correction of prices; whether a mobile application to interact directly with the kernel and the database of the site; whether there are already ready decisions to similar task, to not reinvent a Bicycle and not to disgrace in front of the "audience"?
PS the Questions are stupid, as still do not pull even Junior.