Compose List and Grid Quiz

Welcome to the quiz on “Lists and Grids in Jetpack Compose”! This quiz will test your understanding of how to use different list and grid components in Jetpack Compose, including the differences between standard and lazy lists, enabling scroll behavior, and using advanced features like sticky headers and programmatic scrolling. You’ll also explore the use of LazyColumn, LazyRow, and LazyVerticalGrid for efficient rendering of large sets of data.

Which of the following is NOT true about the LazyVerticalGrid composable in Compose?

It can create grids with adaptive or fixed cell sizes.

It requires you to specify a ScrollState for vertical scrolling.

It automatically makes the grid items scrollable.

It is designed for efficiently displaying large sets of items in a grid format.

None

Which property of LazyListState can be used to detect the current scroll position?

scrollIndex

firstVisibleItemIndex

currentItemIndex

scrollState

None

How do you programmatically scroll a Column that uses a ScrollState?

By applying the scrollBy() function to the Column.

By passing a scrollable parameter to the Column.

By using animateScrollTo(value: Int) on the ScrollState.

By calling the scroll() method with an index.

None

How can you enable vertical scrolling in a Column-based list in Compose?

By using the scrollableColumn() function.

By applying the verticalScroll() modifier with a ScrollState.

By using the LazyColumn composable.

By setting the isScrollable parameter to true.

None

How does LazyColumn handle lists compared to a standard Column?

It creates only the visible items and recycles them as they scroll out of view.

It requires a ScrollState to manage scrolling.

It preloads all items into memory for faster rendering.

It requires all items to be rendered as Text composables.

None

Which component allows you to display grouped lists with headers that stay visible while scrolling?

LazyRow with headers

Column with stickyHeader

ScrollView with headers

LazyColumn with stickyHeader

None

What happens if you use a Column without a ScrollState and the items exceed the viewable area?

The Column automatically scrolls the items.

The Column displays a scroll bar for navigation.

The Column clips the overflowed items.

The Column switches to a LazyColumn mode.

None

What does the animateScrollToItem() function do in a LazyColumn?

Resizes the items in the list to fit the screen.

Scrolls to the last item in the list.

Creates a new composable at the specified index.

Smoothly scrolls to a specified item using its index.

None

What is the benefit of using stickyHeader() in a LazyColumn?

It optimizes the performance of list items.

It changes the orientation of the list to horizontal.

It allows items to stay visible while scrolling past their original position.

It automatically makes the list items scrollable.

None

10.

What is the purpose of the rememberCoroutineScope() function in Compose?

To launch coroutines that are aware of the lifecycle of Compose recompositions.

To manage and remember the state of lists and grids.

To declare variables that need to persist through recompositions.

To create a scope that runs outside of Compose recompositions.

None

11.

What is a key advantage of using LazyListScope in Compose?

It allows precise control over scroll direction.

It supports multi-threaded list rendering.

It provides functions like item() and items() for efficiently adding list items.

It offers better performance for small lists.

None

12.

Which method would you use to smoothly scroll a LazyColumn to a specific item?

smoothScrollTo(index)

scrollTo(index)

scrollToItem(index)

animateScrollToItem(index)

None

13.

Which function allows you to add a single item to a LazyColumn in Compose?

listItem()

add()

singleItem()

item()

None

14.

When should you use LazyColumn instead of a standard Column for a list?

When the list items are all the same size.

When the list is dynamically changing or contains a large number of items.

When the list must be displayed in a fixed size container.

When the list contains fewer than 10 items.

None

15.

What is the primary function of rememberScrollState() in Compose?

To store the number of items in a list.

To enable horizontal scrolling in lists.

To create a state object for remembering scroll position.

To create a static list with fixed scrolling.

None

16.

How can you create a grid with a fixed number of columns using LazyVerticalGrid?

By using GridCells.Fixed with a specified number.

By applying a gridModifier() to the LazyVerticalGrid.

By setting the columnCount parameter.

By setting the adaptiveSize property.

None

17.

Which of the following functions is used to add indexed items to a LazyColumn?

itemsIndexed()

indexedItems()

lazyItems()

itemWithIndex()

None

18.

Which of the following is true about LazyVerticalGrid in adaptive mode?

It requires each cell to have a specific height and width.

It calculates the number of columns based on available space and a specified minimum cell size.

It sets a fixed number of columns based on the screen width.

It does not support scrolling by default.

None

19.

What is the primary advantage of using LazyColumn and LazyRow for displaying lists in Compose?

They provide better styling options than standard Row and Column components.

They improve performance by creating only visible items and destroying those that scroll out of view.

They automatically group list items into different sections.

They allow items to be displayed without requiring composables.

None

20.

What role does the LazyListState play in a LazyColumn or LazyRow?

It is used to remember the scroll position and manage programmatic scrolling.

It sets the size of the list items.

It defines the layout style of the items in the list.

It controls the alignment of items in the list.

None

Time’s up

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