Xamarin Interview Questions and Answers
Founded in the year 2011 in the month of May, Xamarin is a cross-platform development company owned by Microsoft. It is a San Francisco based company that has created Mono, Xamarin.android and Xamarin.iOS in recent years. Xamarin has cross platforms that implement Common Language Infrastructure as well as Common Language Specifications. Codes can be shared on multiple platforms such as Windows and many more. With its growing popularity, there has been an increase in the level of Xamarin Interview questions. Xamarin has a C# shared codebase which makes it easier for the developers to write native Windows, Android and iOS applications with shared codes and native user-interfaces.
Advantages of Xamarin
- They can deliver native iOS, Windows, and Android apps using existing skills, teams, and code(C# XAML).
- With Xamarin technology one can take full advantage of Native APIs. Native controls and behaviors can be mapped with Xamarin.Form elements.
- The app store of Xamarian allows the addition of high-quality components to the app directly from the IDE, including controls, web service API and more.
- Features like PCL/Shared make it very easy for the app developers to share the same code base throughout various projects.
Most Frequently Asked Xamarin Interview Questions
A technique that automatically synchronizes the user interface with its source of data is known as data binding. After data binding, any change made on the business model or data gets automatically reflected in the UI and vice versa.
It notifies users about any error during the compile-time checking of XAML. It eliminates the load and indirect referencing time for XAML elements. It doesn't include the final assembly hence reduces the file size.
There are 3 code sharing techniques in xamarin forms:
- PCL (Portable Class Libraries): It targets different platforms with a common API interface which provides a platform-specific functionality.
- Shared Project: We use a shared project to organize source code and manage platform-specific requirements using the #if compiler.
- Dot Net standard libraries: It allows you to implement code to share across different platforms and can be accessed by a large number of .Net APIs.
A shared code allows you to write a common code that refers to numerous different application projects. It incorporates platform-specific functionality when compiler directives are included in shared code.
Mono Android in Xamarin provides an access to all indigenous Android API's. This is possible because a mono runtime is ported to the Android OS.
| Xamarin | Mono |
|---|---|
| Xamarin is the company that created Mono. | Mono is a substitute for implementing C# |
| It is used to build the tools suite that helps cross-platform development. | It is used to building the apps for mobile and desktop devices |
ICommand is a property in a ViewModel that is used to access the command interface. For this, a ViewModel must refer a class that can implement the ICommand interface. When used with Windows Class, it allows you to share your ViewModels between Xamarin.Forms and Windows App.
It has gained huge popularity since its release. As of 2017, Xamarin has been observed to be used by over 1.4 million developers across 120 countries in the world. Developers wish to enter this firm for a handsome package and a huge scope of work at the same time. With proper preparation, command in coding, confidence, and presence of mind, one can bag a respectable post in this firm.