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

findStartDestination()

currentBackStackEntryAsState()

getCurrentRoute()

observeNavController()

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 primary purpose of the BottomBarDemo project?

To integrate navigation using the Compose NavigationBar component.

To showcase advanced state management in Compose.

To implement complex animations in Compose.

To demonstrate how to create a custom theme in Compose.

None

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

Scaffold

BottomNavigationBar

NavHostController

NavigationBarItem

None

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

To manage animations.

To render custom icons.

To define the navigation graph and handle destination changes.

To access lifecycle states.

None

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

A new instance of the destination is created.

The top bar is hidden.

The back stack is cleared.

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

None

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

androidx.compose.ui

androidx.compose.foundation

androidx.compose.navigation-bar

androidx.navigation:navigation-compose

None

How does the NavigationBarItem indicate which item is selected?

By using a separate state variable.

By updating the back stack manually.

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

By changing the icon color.

None

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

BarItem

NavHost

ComposeItem

ScaffoldItem

None

10.

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 manage animations between screens.

To handle user input events.

None

11.

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

It manages the navigation back stack.

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

It renders the bottom navigation items.

It controls the transition animations between screens.

None

12.

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

composeNavController()

initializeNavController()

createNavController()

rememberNavController()

None

13.

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 start a new activity.

To create multiple instances of the same destination.

None

14.

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

It enables strict type checking and centralized route management.

It allows dynamic route creation during runtime.

It simplifies the creation of back stack entries.

It automatically creates a navigation graph.

None

15.

What is the role of the 'BottomNavigationBar' composable?

To manage the application’s theme.

To render the top bar content.

To create the bottom navigation bar with navigation items.

To define the navigation routes.

None