threads, processes and programs + parallel and concurrency

Process VS Program

Program: A piece of code, an ordered set of instructions.

Process: A dynamic run of a program that uniquely identifies the process through the process Control block.

Process: Dynamic, has the resources, has the unique identification, has the concurrency;

Program: Static, no resources, no unique identity, no concurrency.

Thread: The basic unit of CPU dispatch. A separate running unit that is smaller than the process and can have multiple threads executing concurrently in the same process.

Process: The basic unit of CPU allocation resources.

Parallel: Two or more events occur at the same time.

Concurrency: Two or more events occur at the same time interval.

threads, processes and programs + parallel and concurrency