What is the difference between concurrency and parallelism?
Concurrency and parallelism both refer to managing multiple tasks in computing, but they are different concepts. Concurrency is about managing several tasks at once, but not necessarily executing them simultaneously. It allows a system to handle multiple tasks by switching between them, making progress on each. Parallelism, on the other hand, involves executing multiple tasks at the same time, often on multiple processors or cores. In parallelism, tasks are truly simultaneous, whereas concurrency focuses on the structure and management of tasks, regardless of whether they run at the same time or not.