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It says nothing about which thread runs it — that's decided by the dispatcher.",{"id":146,"topic":9,"difficulty":129,"body":147,"options":148,"correct_key":136,"explanation":157},"019fa914-6110-7c14-8728-1e246e1b1cd2","Why can't a `suspend` function be called directly from ordinary (non-suspend) code?",[149,151,153,155],{"key":133,"text":150},"Because suspend functions always throw an exception when called synchronously.",{"key":136,"text":152},"Because suspending needs a coroutine context to manage pause\u002Fresume.",{"key":139,"text":154},"Because the Kotlin compiler physically removes suspend functions from release builds.",{"key":142,"text":156},"Because suspend functions can only exist inside `object` declarations.","A `suspend` function needs a `Continuation` and a coroutine scope to actually suspend\u002Fresume; ordinary code has no such mechanism, so the compiler requires a coroutine builder (`launch`, `runBlocking`, etc.) or another suspend function as the caller.",{"id":159,"topic":9,"difficulty":160,"body":161,"options":162,"correct_key":133,"explanation":171},"019fa914-6112-755a-8418-1d182cae5241",2,"What is the key difference between `launch` and `async` as coroutine builders?",[163,165,167,169],{"key":133,"text":164},"`launch` returns a result-less `Job`; `async` returns an awaitable `Deferred\u003CT>`.",{"key":136,"text":166},"`async` always runs on `Dispatchers.IO`, `launch` always runs on `Dispatchers.Main`.",{"key":139,"text":168},"`launch` can only be called inside `runBlocking`, `async` cannot.",{"key":142,"text":170},"There is no real difference; they are aliases for the same function.","Both start a new coroutine, but `launch` is fire-and-forget (its `Job` only tracks completion\u002Fcancellation), whereas `async` is meant for computing a value you'll retrieve later via `await()`.",{"id":173,"topic":9,"difficulty":160,"body":174,"options":175,"correct_key":142,"explanation":184},"019fa914-6113-7866-b59d-5cca2d281285","Inside a `coroutineScope { ... }` block, one of two concurrently launched child coroutines throws an exception. 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This differs from `supervisorScope`, where siblings are isolated.",{"id":186,"topic":9,"difficulty":129,"body":187,"options":188,"correct_key":139,"explanation":197},"019fa914-6114-77c3-9dfe-22ef53d57590","What is `Dispatchers.Main` generally used for in Android coroutines?",[189,191,193,195],{"key":133,"text":190},"Running disk or network I\u002FO operations.",{"key":136,"text":192},"Running CPU-intensive background computation.",{"key":139,"text":194},"Running code that must touch the UI thread.",{"key":142,"text":196},"Running code that must never be cancelled.","`Dispatchers.Main` confines execution to the UI (main) thread — required for any View\u002FUI update — while `Dispatchers.IO` and `Dispatchers.Default` are meant for blocking I\u002FO and CPU-bound work respectively.",{"id":199,"topic":9,"difficulty":160,"body":200,"options":201,"correct_key":139,"explanation":210},"019fa914-6115-7071-876f-35d89becf5ec","Why does `Dispatchers.IO` typically use a much larger thread pool than 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