C++ Certified Professional Programmer (CPP)

What is the difference between parallelism and concurrency?

They are identical concepts Concurrency is about dealing with multiple tasks at once (possibly interleaved); parallelism is executing multiple tasks simultaneously on multiple processors Parallelism is single-threaded; concurrency is multi-threaded Concurrency requires multiple CPUs; parallelism does not

Correct Answer:

Concurrency is about dealing with multiple tasks at once (possibly interleaved); parallelism is executing multiple tasks simultaneously on multiple processors

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