Compose Navigation Bar Quiz

Welcome to the Compose Navigation Bar Quiz! This quiz will test your understanding of integrating navigation into a Compose-based Android app using the NavigationBar component. It covers key concepts such as setting up navigation routes, creating and managing the NavHostController, using the Scaffold component for layout, and handling navigation interactions.

Which component is used to manage the back stack and track the current destination in the BottomBarDemo project?

Scaffold

BottomNavigationBar

NavHostController

NavigationBarItem

None

Which function is used to create a stateful NavHostController instance in Compose?

createNavController()

initializeNavController()

composeNavController()

rememberNavController()

None

Which method is used to retrieve the current route in the BottomNavigationBar?

getCurrentRoute()

findStartDestination()

currentBackStackEntryAsState()

observeNavController()

None

Which of the following libraries is added for navigation support in the BottomBarDemo project?

androidx.compose.navigation-bar

androidx.compose.foundation

androidx.compose.ui

androidx.navigation:navigation-compose

None

How does the NavigationBarItem indicate which item is selected?

By changing the icon color.

By using a separate state variable.

By comparing the current route with the item’s route.

By updating the back stack manually.

None

What is the benefit of defining routes using a sealed class?

It automatically creates a navigation graph.

It simplifies the creation of back stack entries.

It enables strict type checking and centralized route management.

It allows dynamic route creation during runtime.

None

What role does the 'TopAppBar' play in a Scaffold layout?

It controls the transition animations between screens.

It displays the title and content at the top of the screen.

It renders the bottom navigation items.

It manages the navigation back stack.

None

What does the 'popUpTo' function do in the navigation setup?

It saves the state of the current destination.

It adds a new destination to the top of the stack.

It resets the navigation graph.

It removes all destinations up to a specified destination.

None

What is the role of the 'BottomNavigationBar' composable?

To manage the application’s theme.

To create the bottom navigation bar with navigation items.

To define the navigation routes.

To render the top bar content.

None

10.

Why is the 'NavHost' used in conjunction with the NavHostController?

To define the navigation graph and handle destination changes.

To manage animations.

To render custom icons.

To access lifecycle states.

None

11.

What is the primary purpose of the BottomBarDemo project?

To demonstrate how to create a custom theme in Compose.

To showcase advanced state management in Compose.

To integrate navigation using the Compose NavigationBar component.

To implement complex animations in Compose.

None

12.

What happens when 'saveState' is set to true in the navigate method?

The state of the current screen is saved for later restoration.

The top bar is hidden.

The back stack is cleared.

A new instance of the destination is created.

None

13.

What is the purpose of using 'launchSingleTop' in the navigate method?

To add a floating action button.

To create multiple instances of the same destination.

To ensure only one instance of a destination is on the top of the back stack.

To start a new activity.

None

14.

Which class is used to represent each item in the bottom bar?

ScaffoldItem

BarItem

NavHost

ComposeItem

None

15.

What is the purpose of the 'NavHost' in the Compose Navigation system?

To handle user input events.

To serve as a placeholder for navigation destinations.

To display the current back stack entry.

To manage animations between screens.

None