Yeah what about it..??

A backdoor computing system allows a user to gain illegal remote access to a computer by bypassing normal authentication. The user attempts to remain undetected while they obtain information on said computer.

Real time processing or Batch processing or Multiprocessing or all of them.

Software application resides on a remote server.

Cloud computing is basically a huge database full of information and data that are compiled into a server in a remote location. The significance of cloud computing is that someone who uses a lighter application from somewhere can access this information from anywhere, as long as they have a connection to this remote server.