parallel processors

Answer 1

A parallel processor can be described as when a processor can have multiple processes operating or existing at the same time, but are executing in a sort of interleaved fashion on the same core - this is more parallel processing or execution.
Alternatively, parallel processors in computers like the blue gene/L can be many processors installed and linked together by a communicating bus where every processor could be running the same or different tasks or processes and the results are gathered up and stored in memory or written out to disk. One or more processors act as a controller for a population of other processors and one acts as the overall command and control processor by communicating with the other controllers. This kind of tree structure can allow thousands of processors to be utilised for a large application written in a suitable programming language