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.

What is the role of the 'BottomNavigationBar' composable?

To define the navigation routes.

To create the bottom navigation bar with navigation items.

To render the top bar content.

To manage the application’s theme.

None

What is the primary purpose of the BottomBarDemo project?

To implement complex animations in Compose.

To showcase advanced state management in Compose.

To demonstrate how to create a custom theme in Compose.

To integrate navigation using the Compose NavigationBar component.

None

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

It saves the state of the current destination.

It resets the navigation graph.

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

It removes all destinations up to a specified destination.

None

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

It simplifies the creation of back stack entries.

It enables strict type checking and centralized route management.

It allows dynamic route creation during runtime.

It automatically creates a navigation graph.

None

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

ComposeItem

NavHost

BarItem

ScaffoldItem

None

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

To display the current back stack entry.

To serve as a placeholder for navigation destinations.

To handle user input events.

To manage animations between screens.

None

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

NavigationBarItem

NavHostController

BottomNavigationBar

Scaffold

None

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

To access lifecycle states.

To manage animations.

To define the navigation graph and handle destination changes.

To render custom icons.

None

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

rememberNavController()

initializeNavController()

createNavController()

composeNavController()

None

10.

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

To add a floating action button.

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

To create multiple instances of the same destination.

To start a new activity.

None

11.

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

androidx.compose.foundation

androidx.compose.ui

androidx.compose.navigation-bar

androidx.navigation:navigation-compose

None

12.

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

A new instance of the destination is created.

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

The top bar is hidden.

The back stack is cleared.

None

13.

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

14.

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

It renders the bottom navigation items.

It manages the navigation back stack.

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

It controls the transition animations between screens.

None

15.

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

currentBackStackEntryAsState()

findStartDestination()

observeNavController()

getCurrentRoute()

None