async and await, Task, actors, Sendable, structured concurrency, MainActor and Grand Central Dispatch.
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- What keyword allows a function to be suspended and resumed in Swift?
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async- What keyword is used to call an async function?
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await- What is the purpose of structured concurrency?
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To ensure all child tasks complete before a scope exits- What is a Task in Swift concurrency?
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A lightweight unit of concurrent work that runs independently- What is an actor in Swift?
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A reference type that protects mutable state with serial access- What protocol makes a type safe to share across actors?
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Sendable- What is MainActor?
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An actor that guarantees code runs on the main thread- What is Grand Central Dispatch?
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A low-level API for managing concurrent work using queues- How do actors prevent data races?
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By ensuring only one task accesses mutable state at a time- What does Task { } do?
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Creates a new concurrent task that runs independently- How do you make a custom type Sendable?
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Have it conform to the Sendable marker protocol- What happens when you await an async function?
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The current task suspends until the function returns- What is a suspension point in Swift concurrency?
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A location where a task pauses and another task can resume- What is the main benefit of structured concurrency?
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Automatic resource cleanup and cancellation propagation- When should you use MainActor annotation?
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For code that must execute on the main thread
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