Android Background Processing Flashcards
6 cards from real Android Development practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Android Background Processing flashcards as text
What is the purpose of CoroutineScope in Kotlin?
Answer: To define the lifecycle and context in which coroutines run
CoroutineScope defines a scope for launching coroutines, ensuring they are cancelled when the scope is cancelled (e.g., when a ViewModel is cleared).
Which WorkManager class is used to chain multiple work tasks sequentially?
Answer: WorkContinuation
WorkContinuation allows you to create chains of WorkRequests that execute sequentially or in parallel using then() and combine() methods.
What does the suspend keyword do to a Kotlin function?
Answer: Marks it as a suspending function that can be paused and resumed
The suspend keyword marks a function as a coroutine that can suspend its execution without blocking the calling thread.
Which Android component replaced IntentService for background processing?
Answer: Both A and B
Both WorkManager and JobIntentService replaced IntentService, with WorkManager being preferred for most deferrable background work.
What is the viewModelScope in Android?
Answer: A CoroutineScope tied to the ViewModel's lifecycle that cancels when the ViewModel is cleared
viewModelScope is an extension property on ViewModel that provides a CoroutineScope automatically cancelled when the ViewModel is destroyed.
How do you specify Constraints for a WorkManager WorkRequest?
Answer: Using the Constraints.Builder class
Constraints.Builder is used to build a Constraints object specifying network type, charging state, storage, and other requirements for work execution.