Xamarin Certification Xamarin Data and Services 2

Question 1

What is the purpose of Xamarin.Essentials Preferences API?

Accepted Answer

Stores simple key-value pairs persistently using platform-native storage

Answer

Manages user authentication preferences

Answer

Configures app theme settings only

Answer

Handles in-app purchase preferences

Question 2

Which Xamarin.Essentials class allows accessing the device's file system paths cross-platform?

Accepted Answer

FileSystem

Answer

StorageManager

Answer

Environment

Answer

PathHelper

Question 3

In Xamarin, what does the Repository pattern provide when working with data sources?

Accepted Answer

An abstraction over data access logic, separating business logic from data source details

Answer

A local cache of remote data only

Answer

A NuGet package for database access

Answer

A built-in Xamarin.Forms control

Question 4

Which Azure service is commonly integrated with Xamarin apps for backend data sync and offline support?

Accepted Answer

Azure Mobile Apps (Easy Tables)

Answer

Azure DevOps

Answer

Azure Blob Storage only

Answer

Azure Active Directory only

Question 5

In Xamarin, what does the Retry Pattern help with when calling remote services?

Accepted Answer

Automatically retrying failed transient network requests with backoff

Answer

Caching responses to avoid repeated requests

Answer

Routing requests through alternative endpoints

Answer

Batching API calls for efficiency

Question 6

Which Xamarin.Essentials API provides cross-platform access to the device's geolocation?

Accepted Answer

Geolocation

Answer

LocationManager

Answer

CLLocationManager

Answer

GPS