Xamarin Certification Xamarin.Android Development 2

Question 1

Which Xamarin.Android control displays a scrollable list of items using view recycling?

Accepted Answer

RecyclerView

Answer

RecyclerView is the modern Android list control that recycles view holders for efficient scrolling.

Question 2

In Xamarin.Android, how do you request a runtime permission (Android 6.0+)?

Accepted Answer

ActivityCompat.RequestPermissions

Answer

ActivityCompat.RequestPermissions is the backward-compatible method to request permissions at runtime.

Question 3

What is the purpose of the AndroidManifest.xml in Xamarin.Android?

Accepted Answer

Declares app components, permissions, and metadata

Answer

AndroidManifest.xml is the app's configuration file declaring activities, services, permissions, and min SDK version.

Question 4

Which lifecycle method should you override to save Activity state before it is destroyed?

Accepted Answer

OnSaveInstanceState

Answer

OnSaveInstanceState provides a Bundle to save transient UI state that can be restored in OnCreate.

Question 5

In Xamarin.Android, which class is used to run background tasks that survive Activity recreation?

Accepted Answer

ViewModel

Answer

ViewModel (from AndroidX) stores UI-related data that survives configuration changes like screen rotation.

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