Xamarin Certification Xamarin.Android Development 3

Question 1

Which Xamarin.Android attribute marks a method as a broadcast receiver callback?

Accepted Answer

[BroadcastReceiver]

Answer

The [BroadcastReceiver] attribute on a class registers it as a broadcast receiver in the manifest.

Question 2

In Xamarin.Android, what is the purpose of the Resource.Designer.cs file?

Accepted Answer

Auto-generated file providing typed IDs for all app resources

Answer

Resource.Designer.cs is auto-generated by the build system and exposes all resource IDs as typed constants under Resource.*.

Question 3

Which service type in Xamarin.Android runs in the foreground with a persistent notification?

Accepted Answer

Foreground Service

Answer

A Foreground Service runs at high priority with a visible notification, making it less likely to be killed by the OS.

Question 4

What does the [IntentFilter] attribute do in Xamarin.Android?

Accepted Answer

Declares which intents an Activity or receiver responds to

Answer

[IntentFilter] generates an <intent-filter> entry in the manifest so the component receives matching implicit intents.

Question 5

In Xamarin.Android, which layout positions child views relative to each other or the parent?

Accepted Answer

RelativeLayout

Answer

RelativeLayout positions children relative to sibling views or the parent container using alignment rules.

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