How to run python, java, php, nodejs,ruby applications on same vps?
Any user can run any service on a VPS. Just make sure that you are not conflicting with available ports in your services.
How to run python(Django,Flask), Java(spring),PHP, Nodejs(express),Ruby(rails) application on same VPS.If it is possible on VPS, can we do similar on Reseller Hosting where we have SSH Access.

I have readed on some other Articles they.. suggests to Use "Virtual Host" in Apache.
  Also which one is better NGINX or Apache for same..?