Learning the difference between concurrency and parallelism

Concurrency and parallelism are often mistaken for the same thing, but they are different. Concurrency does many tasks at the same time using multi-threading. Multi-threading allots time to various threads based on time/context switching. This presents the illusion that the computer is doing multiple things at the same time. But it is, in reality, only doing one thing. Parallelism, on the other hand, does many things all at the same time.

Concurrency is used to manage multiple computations simultaneously. It accomplishes this using interleaving operations. The benefit of concurrency is that it increases the amount of work that can be completed over time. It uses context switching to perform interleaving operations. Concurrency can work with a single processor. You are already aware of concurrency at work, as you will have had multiple applications running at the same time. All these programs are making use of concurrency...