Xamarin Certification Xamarin Certification 2

Question 1

Which Xamarin.Forms layout arranges children in a single row or column?

Accepted Answer

StackLayout

Answer

StackLayout arranges child views in a single horizontal or vertical line.

Question 2

What is the purpose of the DependencyService in Xamarin.Forms?

Accepted Answer

To access platform-specific functionality from shared code

Answer

DependencyService allows shared code to call platform-specific implementations registered on each platform.

Question 3

In Xamarin.Android, which method is called when an Activity is first created?

Accepted Answer

OnCreate()

Answer

OnCreate() is the first lifecycle method called when an Android Activity is instantiated.

Question 4

Which binding mode in Xamarin.Forms updates the source when the target changes?

Accepted Answer

OneWayToSource

Answer

OneWayToSource propagates changes from the binding target back to the binding source.

Question 5

What attribute is used to register a Xamarin.Forms custom renderer?

Accepted Answer

[ExportRenderer]

Answer

The [ExportRenderer] assembly-level attribute maps a Xamarin.Forms control to its platform-specific renderer.

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