Add table differentiating types of concurrency

[frozenfrank]

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[frozenfrank]

Here is one misconception that arises from the current mixing of meanings of "concurrent." Emphasis added to highlight misunderstanding.

QUESTION: A system has four processes executing on a single CPU core, interleaving their execution in arbitrary order. Is this an example of concurrency, parallelism, or both? Explain how each is or is not being used.
ANSWER: t is concurrent: Because they are executed in arbitrary order, this implies concurrency. If order mattered, then it would not be concurrent
It is not parallel: Because there is only a single CPU core, you have the illusion of parallel-ness, since it swaps between the 4 tasks incredibly quickly. However, they are not happening at the exam same time, since their execution is being interleaved, not simultaneous.