Saving ViewModel state across process death? - Android Interview Questions | Android Engineers

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Questions

•How to keep a video maintain a playing state when we rotate the screen?•How many callbacks are in Fragments?•What could be the reasons why onPause didn't get triggered?•What kind of events trigger onPause() to run?•In what scenario does the 'onDestroy' get called directly after 'onCreate'?•Which callback gets called on Activity when an AlertDialog is shown?•What's the lifecycle in PIP (Picture-in-Picture)?•What happens if you rotate the device?•Inside a viewpager (Fragment state pager adapter) what will be the lifecycle of the fragments when you swap from one tab to another?•Why onActivityCreated is now deprecated in Fragment?•Which callback should I use if I want to know when my activity came to the foreground?•When is onActivityResult called?•What does setRetainInstance do and how can you avoid it?•What callbacks trigger when a Dialog opens up? In both cases, the dialog is attached from the same activity/fragment and another activity/fragment.•What do launchWhenCreated, launchWhenStarted, and launchWhenResumed functions do?•Fragment Callbacks when moving from one fragment to another and coming back to prev one?•Does onCreateView get called after coming to a fragment from top fragment?•When does ViewModel not survive?•How to keep a video maintain a playing state when we rotate the screen?•How many callbacks are in Fragments?•What could be the reasons why `onPause` didn't get triggered?•What kind of events trigger `onPause()` to run?•In what scenario does the "onDestory" get called directly after "onCreate"?•Which callback gets called on Activity when an AlertDialog is shown?•What's the lifecycle in PIP (Picture-in-Picture)?•What happens if you rotate the device?•Inside a viewpager (Fragment state pager adapter) what will be the lifecycle of the fragments when you swap from one tab to another?•Why onActivityCreated is now depreciated in Fragment?•Which callback should I use if I want to know when my activity came to the foreground?•When is onActivityResult called?•What does setRetainInstance do and how you can avoid it?•What callbacks trigger when a Dialog opens up? In both cases, the dialog is attached from the same activity/fragment and another activity/fragment.•What do `launchWhenCreated`, `launchWhenStarted`, and `launchWhenResumed` functions do?•Fragment Callbacks when moving from one fragment to another and coming back to prev one?•Does onCreateView get called after coming to a fragment from top fragment?•When does ViewModel not survive •What are the different Coroutine Scopes?•How to manage series and parallel execution?•Difference between Flow/SharedFlow/StateFlow and elaborate it.•What happens if we call `.cancel()` from a coroutine scope?•What is an Init block in Kotlin?•How to choose between apply and with?•What is inline function in Kotlin?•Difference between Coroutine and Java Thread •Why Coroutines are light weight?•How does Coroutine switch context?•When to use Kotlin sealed classes?•Suspending vs Blocking in Kotlin Coroutines •What are Dispatchers and Name all of them •On which thread Dispatchers .Default execute the task or use which thread?•Dispatchers .Default vs Dispatcher .IO •What is SupervisorScope?•Exception Handling in Coroutine •Map vs FlatMap in kotlin •Singleton Pattern in Kotlin with object keyword •Collections API in Kotlin •What is Unidirectional Flow •StateFlow vs SharedFlow •Higher Order Functions in Kotlin •Covariance in Kotlin •Delay vs Thread.sleep?•Process Death vs Activity Destruction?•Activity Lifecycle: A starts B, what happens to A?•Fragment Lifecycle vs View Lifecycle?•`onSaveInstanceState` vs `onRestoreInstanceState` usage?▶Saving ViewModel state across process death?

LifecycleAdvanced4 min

Saving ViewModel state across process death?

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How to keep a video maintain a playing state when we rotate the screen?

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