Compose Biometric Authentication Quiz

This quiz will test your understanding of implementing biometric authentication in Android applications. It covers key concepts such as the roles of BiometricManager and BiometricPrompt, the process of setting up and using fingerprint or face authentication, and the steps involved in configuring an Android project to support these features. By answering these questions, you’ll be able to gauge your knowledge of how to integrate biometric authentication into your apps, manage user interactions, and ensure a secure authentication flow.

Which biometric permission is required in the AndroidManifest.xml file to support both fingerprint and face authentication?

android.permission.AUTHENTICATE_BIOMETRIC

android.permission.READ_BIOMETRIC_DATA

android.permission.USE_BIOMETRIC

android.permission.CAMERA

None

Why is the mainExecutor used when creating a BiometricPrompt instance?

To ensure authentication callbacks are handled on the main thread.

To register new biometric data.

To handle hardware interactions with the fingerprint sensor.

To manage background biometric processes.

None

What does the BiometricPrompt class do?

It displays a custom authentication screen.

It manages user settings for biometric authentication.

It checks if the device supports biometric authentication.

It displays a standard dialog for user authentication and reports the results.

None

How is the initial fingerprint data enrolled on a physical Android device?

By uploading it to Google Play Services.

Using a third-party biometric scanner.

Through the device’s Security & privacy settings.

By adding it through the app’s settings.

None

What is the purpose of the setNegativeButtonText() method in the BiometricPrompt.Builder?

To set the message for failed authentication attempts.

To define a message displayed on successful authentication.

To define the text displayed on the cancel button of the prompt.

To specify the retry interval for biometric authentication.

None

In the context of biometric authentication, what is a 'singleton' object in Kotlin?

An object that has only one instance throughout the app.

A class used for user interface components.

A class that manages biometric data.

An object that can be instantiated multiple times.

None

What role does BiometricPrompt.AuthenticationCallback play in biometric authentication?

It is used to update the app’s biometric settings.

It provides methods to handle authentication results.

It manages the storage of fingerprint data.

It displays the user interface for biometric authentication.

None

What is required to initiate fingerprint authentication on a device?

A device with a built-in face scanner.

At least one enrolled fingerprint and a secure lock screen.

A third-party biometric library.

An API level of 21 or above.

None

Why is the BiometricPrompt.authenticate() method called?

To update user biometric preferences.

To check for previously stored fingerprint data.

To verify that the device supports biometrics.

To initiate the user authentication process.

None

10.

What is the role of the BiometricPrompt.PromptInfo.Builder class?

It creates a configuration for the biometric prompt, including title and button text.

It manages user authentication callbacks.

It checks hardware compatibility for biometric authentication.

It handles the registration of biometric data.

None

11.

Which method in BiometricPrompt is used to handle errors during authentication?

onAuthenticationFailed

onAuthenticationSucceeded

onAuthenticationError

onBiometricCanceled

None

12.

What is the primary purpose of the BiometricManager class in Android biometric authentication?

To manage user interactions with biometric sensors.

To store fingerprint data on the device.

To verify hardware support for biometric authentication and check user settings.

To display a dialog for user authentication.

None

13.

What happens when too many failed biometric authentication attempts occur?

The app requests the user to register a new biometric.

The device is locked permanently.

The app is automatically closed.

The user must authenticate through the lock screen.

None

14.

Why is the biometric prompt dialog necessary in the authentication process?

To provide access to the device’s camera.

To guide the user through biometric authentication.

To collect user feedback on the app.

To store user credentials.

None

15.

Which Android API level is required as a minimum for the BiometricDemo project?

API 29 (Q)

API 21 (Lollipop)

API 26 (Oreo)

API 23 (Marshmallow)

None

16.

Why is it necessary to use FragmentActivity instead of ComponentActivity when working with BiometricPrompt in Jetpack Compose?

Because ComponentActivity does not support Compose UI.

Because FragmentActivity is more secure.

Because it simplifies the UI structure.

Because BiometricPrompt requires a context from FragmentActivity.

None

17.

Why is it important to check if the device supports biometric authentication before initiating the process?

To avoid displaying a biometric prompt on unsupported devices.

To ensure that the app displays the correct language.

To save battery life during authentication.

To verify that the device has a compatible display.

None

18.

Which method is used to check if biometric authentication is available and enabled on a device?

BiometricManager.canAuthenticate()

BiometricPrompt.authenticate()

BiometricManager.checkAuthentication()

BiometricPrompt.isAvailable()

None