Dependent work, priority inversion
You have independent pieces of work A, B, and C. C must run only after both A and B have finished, the order of A and B doesn't matter, and they don't nest inside each other. Tell me every way you know to implement that, with the pros and cons.
ConcurrencyShort answerBasics
When a screen appears you call three APIs in parallel, profile, feed, and notifications, …
#dispatchgroup #async-let
ConcurrencyShort answerBasics
You're building an image pipeline: download, resize, then save to the disk cache, and whe…
#operationqueue
ConcurrencyMultiple choiceBasics
In this cache built on a GCD concurrent queue, which statement about the role of the .bar…
#barrier
ConcurrencyMultiple choiceAdvanced
Which of the following statements about structured concurrency (async let, TaskGroup) are…
#async-let