Kotlin Language & Build.

The Kotlin language including coroutines/Flow (language-level concurrency), DI and the Gradle build system. Covers 6 sub-skills.

• Kotlin Language & Build · 1 of 3

  Coroutines & Kotlin Flow

  Which of these starts a new coroutine?

  Arepeat(3) {}Bapply { }Claunch { }Dalso { it }

• Kotlin Language & Build · 2 of 3

  Dependency Injection (Hilt & Dagger)

  Which annotation tells Hilt that a binding lives for the whole application process?

  A@Singleton with @InstallIn(SingletonComponent::class)B@AppScope with @InstallIn(ApplicationComponent::class)C@Reusable with @InstallIn(SingletonComponent::class)D@ProcessScope with @InstallIn(ApplicationComponent::class)

• Kotlin Language & Build · 3 of 3

  Coroutines & Kotlin Flow

  A search screen calls repo.search(query) inside flow.collect for every keystroke and traces show overlapping in-flight requests for stale queries. Which operator pair matches the current Flow-idiomatic fix?

  Asample(300) followed by flatMapMerge(concurrency = 1) { repo.search(it) } on itBbuffer(Channel.CONFLATED) followed by mapLatest { repo.search(it) } on the same FlowCdebounce(300) followed by flatMapLatest { repo.search(it) } on the query FlowDthrottleFirst(300) followed by flatMapConcat { repo.search(it) } on the query Flow