Compose Sticky Headers Quiz

In this quiz, you will test your understanding of implementing lazy lists with sticky headers and scroll detection in Jetpack Compose. The questions focus on concepts such as using LazyColumn and LazyRow for efficient list rendering, grouping data with the groupBy() method, implementing sticky headers for grouped data, and detecting scroll positions to trigger UI actions. This quiz also covers the usage of important Compose functions and modifiers like scrollToItem(), AnimatedVisibility, rememberLazyListState, and more.

Why is the ExperimentalFoundationApi annotation used when adding sticky headers?

To access experimental APIs in Compose.

To handle errors during scrolling.

To enable backward compatibility.

To improve performance.

None

What happens when the AnimatedVisibility composable is used?

It hides a component permanently.

It scrolls the list automatically.

It changes the background color of a component.

It animates the showing and hiding of a component.

None

What does the scrollToItem function do?

Animates the scrolling to the top of the list.

Scrolls the list horizontally.

Instantly scrolls to a specified pixel position.

Instantly scrolls to a specified item index.

None

What is the purpose of the derivedStateOf function in this context?

To calculate a state based on changes in another state.

To create a new list state.

To manage item clicks.

To optimize the rendering of images.

None

Which function is used to launch the scroll-to-top action in a coroutine?

animateScrollTo()

scrollToItem()

launchScroll()

launchAsync()

None

What does the PaddingValues parameter do in a LazyColumn?

Aligns list items to the center.

Sets margins for the entire list.

Adjusts the spacing between list items.

Adds padding to the content of the list.

None

Why is the padding() modifier used for the scroll-to-top button?

To change the button size.

To add space around the button.

To adjust the text alignment.

To change the button color.

None

Which function is used to detect the scroll position of a LazyColumn?

getScrollState()

getScrollPosition()

listState.firstVisibleItemIndex

scrollOffset()

None

What is the primary purpose of using the groupBy() function in the LazyColumn?

To sort the items alphabetically.

To filter out certain list items.

To group items by a common selector for sticky headers.

To divide the list into smaller arrays.

None

10.

Which parameter is used to specify the text displayed in a sticky header?

text

label

content

color

None

11.

What modifier is used to add bottom padding to the LazyColumn?

contentPadding

padding()

verticalPadding

paddingBottom()

None

12.

How is the coroutineScope used when handling scroll actions in this tutorial?

To delay UI updates.

To launch scroll actions asynchronously.

To stop the scrolling animation.

To block the main thread.

None

13.

What is the function of the fillMaxWidth() modifier in the sticky header?

To make the header occupy the full width of the screen.

To adjust the text alignment within the header.

To make the header scroll horizontally.

To restrict the width of the header.

None

14.

What does the stickyHeader function do in a LazyColumn?

Optimizes the performance of scrolling.

Displays a header that stays visible while its group scrolls.

Adds a shadow effect to list items.

Prevents items from being recycled.

None

15.

Which element is responsible for adjusting the visibility of the scroll button?

LazyListScope

ScrollState

AnimatedVisibility

Row

None