Recomposition will always return the value produced by composition. - Android Interview Questions | Android Engineers

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Questions

•How to launch a coroutine from a Composable function?•How to launch a coroutine from a non-Composable function, but tied to composition?•What is recomposition in Jetpack Compose?•What is remember in Jetpack Compose?•Why and when to use remember {}?•Difference between LazyColumn and RecyclerView?•What is AndroidView in Compose?•What is the lifecycle of Composables?•How to avoid recomposition if state is unchanged?•What are stable types that can skip recomposition?•What is State in Jetpack Compose?•What is MutableState and how does recomposition happen?•How to retain State across recomposition and configuration changes?•Difference between Stateless and Stateful Composables?•Difference between remember and LaunchedEffect?•What is CompositionLocal?•How to create Custom Views in Compose?•What are the benefits of Jetpack Compose?•How does Jetpack Compose integrate with existing Android frameworks?•What are the best practices for performance optimization in Jetpack Compose?•How is navigation handled in Jetpack Compose?•How to use Canvas in Jetpack Compose for custom drawing?•What are Modifier chains, and how to optimize them?•What is LazyVerticalGrid, and when to use it?•How to create dynamic themes using Material3 in Jetpack Compose?•What is SideEffect, and when to use it?•What is the purpose of DisposableEffect in Compose?•Difference between LaunchedEffect and SideEffect?•How to handle animation in Jetpack Compose?•What is AnimationSpec, and how to use it?•What are rememberUpdatedState and derivedStateOf in Compose?•What is a key in remember, and why is it important?•How to create a Snackbar in Jetpack Compose?•What is Scaffold in Jetpack Compose?•How to handle WindowInsets in Jetpack Compose?•What is BackHandler in Jetpack Compose?•How to use a ViewModel in Jetpack Compose?•How to implement LazyRow or LazyColumn with sticky headers?•What is Paging in Jetpack Compose?•How to use Accompanist libraries for Compose?•How to use Compose with Jetpack Navigation?•What is Layout in Compose, and how does it work?•What are the performance considerations in Jetpack Compose?•How to manage State Hoisting in Jetpack Compose?•What is Wear Compose, and how to use it for Wear OS apps?•How to test Composables in Jetpack Compose?•What are custom Modifiers, and how to create them?•How to launch a coroutine from a composable function? - [LaunchedEffect](https://www.droidcon.com/2021/10/28/jetpack-compose-side-effects-ii-remembercoroutinescope/)•How to launch a coroutine from a non-composable function, but tied to composition? - [rememberCoroutineScope()](https://www.droidcon.com/2021/10/28/jetpack-compose-side-effects-ii-remembercoroutinescope/)•What is recomposition? [Recomposition](https://developer.android.com/jetpack/compose/mental-model#recomposition)•**What is `remember` in compose?**•A composable function to remember the value produced by a calculation only at the time of composition. It will not calculate again in recomposition.▶Recomposition will always return the value produced by composition.•Whole Compose is based on the concept of `Positional Memoization`•Why and when to use `remember {}`?•Difference between `LazyColumn` and `RecyclerView`?•What is AndroidView in compose?•What is the lifecycle of composeables?•How to avoid recomposition of any composable, if the state is not changed?•What are stable types that can skip recomposition?•What is State?•What is MutableState and how does recomposition happen?•How to retain State across recomposition and configuration changes?•Difference between Stateless and Stateful composeables?•What are your thoughts on flat hierarchy, constraint Layout in compose vs. the older view hierarchy in xml •Difference b/w remember and LaunchedEffect •Does re-composition of `ComposeItem1` bring any effect on `ComposeItem2`? If yes, then how?•`ComposeParent() { ComposeItem1 {} ComposeItem2() {...} } `•What is `CompositionLocal`?•Custom views in compose •Canvas in Compose •What are the benefits of Jetpack Compose?•How does Jetpack Compose integrate with existing Android frameworks and libraries?•What are the best practices for performance optimization in Jetpack Compose?•How is navigation handled in Jetpack Compose?•What is Strong Skipping Mode?•What is `rememberSaveable` vs `remember`?•Explain `SideEffect` vs `LaunchedEffect` vs `DisposableEffect`?•What is `CompositionLocal` and when to use it?•What triggers Recomposition? How to skip it?•`derivedStateOf` use cases?•`rememberUpdatedState` explanation?•`LazyColumn` internals vs `RecyclerView`?•Significance of Modifier compatibility and order?•Using `ConstraintLayout` in Compose?•View interoperability (Compose in Xml, Xml in Compose)?•`subcompose` layout modifier?•Intrinsic measurements in Compose?•How to use `Layout` composable for custom layouts?•What are the use cases for `SubcomposeLayout`?•How and when to use `produceState`?•Using `snapshotFlow` to convert State to Flow?•How does `CompositionLocalProvider` handle dynamic updates?•Explain Stability (`@Stable`, `@Immutable`) in Compose?•Describe the Compose Phases (Composition -> Layout -> Drawing)?•Basics of drawing with `Canvas` in Compose?•How to handle gestures using `PointerInput`?•How to support Accessibility services in Compose?

Jetpack ComposeIntermediate3 min

Recomposition will always return the value produced by composition.

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Previous Question

A composable function to remember the value produced by a calculation only at the time of composition. It will not calculate again in recomposition.

Whole Compose is based on the concept of `Positional Memoization`

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