Xamarin Certification Xamarin Testing and Deployment 1 — Questions and Answers
Question 1: Which testing framework is recommended for unit testing shared Xamarin code?
- NUnit or xUnit (Correct answer)
- Espresso
- XCTest
- Robolectric
Correct answer: NUnit or xUnit
NUnit and xUnit are the standard .NET unit testing frameworks used to test shared Xamarin business logic and ViewModels.
Question 2: What is Xamarin.UITest used for?
- Automated UI testing of iOS and Android apps using C# (Correct answer)
- Performance profiling
- Screenshot diffing only
- Mocking network calls in tests
Correct answer: Automated UI testing of iOS and Android apps using C#
Xamarin.UITest provides an automated UI testing framework that drives real device or simulator interactions using C# test code.
Question 3: Which cloud service provides device farms for running Xamarin.UITest on real physical devices?
- App Center Test (formerly Test Cloud) (Correct answer)
- Firebase Test Lab
- BrowserStack only
- AWS Device Farm only
Correct answer: App Center Test (formerly Test Cloud)
App Center Test (formerly Xamarin Test Cloud) runs Xamarin.UITest suites across hundreds of real iOS and Android devices in the cloud.
Question 4: What does Moq provide in the context of Xamarin unit testing?
- A mocking library for creating test doubles of interfaces and abstract classes (Correct answer)
- A UI automation runner
- A real device connection layer
- An HTTP mock server
Correct answer: A mocking library for creating test doubles of interfaces and abstract classes
Moq is a .NET mocking library used to create mock implementations of interfaces for isolating the unit under test.
Question 5: In Xamarin.UITest, which method is used to locate a UI element by its accessibility label?
- app.Query(x => x.Marked("label")) (Correct answer)
- app.FindById("id")
- app.GetElement("name")
- app.AccessibilityQuery("label")
Correct answer: app.Query(x => x.Marked("label"))
app.Query(x => x.Marked()) locates elements by their accessibility label, text, or Id cross-platform.
Question 6: Which Xamarin App Center feature provides continuous integration and automated builds?
- App Center Build (Correct answer)
- App Center Crashes
- App Center Analytics
- App Center Push
Correct answer: App Center Build
App Center Build connects to source repositories and triggers automated iOS or Android builds on each commit.
Xamarin Certification Xamarin Testing and Deployment 1
Which testing framework is recommended for unit testing shared Xamarin code?