Top 65 Xamarin Multiple Choice Questions (MCQs) with Answers

1 .

What is XAMARIN?

A)

Testing tool

B)

Web development tool

C)

Mobile App development tool

D)

None of the above

Correct Answer : Mobile App development tool

Explanation : Xamarin is a mobile app development tool.

2 .

Which of the following company owns Xamarin?

A)

IBM

B)

Google

C)

Amazon

D)

Microsoft

Correct Answer : Microsoft

Explanation : Xamarin is owned by Microsoft cooperation.

3 .

What is the purpose of Xamarin.Forms?

A)

To develop iOS applications only

B)

To develop cross-platform applications using a single codebase

C)

To develop Android applications only

D)

To develop Windows applications only

Correct Answer : To develop cross-platform applications using a single codebase

Explanation : Xamarin.Forms is a UI toolkit that enables developers to create native user interfaces for iOS, Android, and Windows using a single, shared codebase. It provides a set of UI controls that map to the native controls on each platform, allowing developers to create native-looking apps without having to write platform-specific code.

4 .

What is the difference between Xamarin.iOS and Xamarin.Android?

A)

Xamarin.iOS and Xamarin.Android are the same thing.

B)

Xamarin.iOS and Xamarin.Android are used for developing cross-platform applications.

C)

Xamarin.iOS is used for developing iOS applications, while Xamarin.Android is used for developing Android applications.

D)

Xamarin.iOS is used for developing Android applications, while Xamarin.Android is used for developing iOS applications.

Correct Answer : Xamarin.iOS is used for developing iOS applications, while Xamarin.Android is used for developing Android applications.

Explanation : Xamarin.iOS is a toolset used for developing native iOS applications using C# and .NET. On the other hand, Xamarin.Android is a toolset used for developing native Android applications using C# and .NET.

5 .

Xamarin has ________ approaches for app development.

A)

1

B)

2

C)

3

D)

4

Correct Answer : 2

Explanation : Xamarin has two approaches for app development. These are Xamarin.Forms and Xamarin Native

6 .

__________ is a tool which is used by the developers to keep an eye on the information about the particular App inside the Visual Studio.

A)

Xamarin Profiler

B)

Xamarin Forms

C)

Xamarin Insights

D)

Xamarin Analyse

Correct Answer : Xamarin Profiler

Explaination : Xamarin Profiler is a tool which is used by the developers to keep an eye on the information about the particular App inside the Visual Studio.

7 .

Xamarin supports __________ languages in the development of mobile applications.

A)

2

B)

3

C)

4

D)

5

Correct Answer : 3

Explanation : Xamarin supports three languages in the development of mobile applications : C#, F# and Visual Basic.NET

8 .

In which language Xamarin applications are written?

A)

C#

B)

Java

C)

Python

D)

None of the above

Correct Answer : C#

Explanation : Xamarin applications are written in C#.

9 .

XAMARIN is built on top of ____?

A)

C#

B)

Java

C)

Python

D)

.NET

Correct Answer : .NET

Explanation : Xamarin is built on top of .NET.

10 .

Which of the following options in Xamarin is for developers who wish to create a single program for all three mobile platforms: Windows, iOS, and Android?

A)

Xamarin.forms

B)

Xamarin.native

C)

Both (A) and (B)

D)

None of the above

Correct Answer : Xamarin.forms

Explaination : Xamarin.forms is for developers who wish to create a single program for all three mobile platforms: Windows, iOS, and Android.

11 .

When we want to construct a distinct version of the same App for multiple platforms, we utilize which of the following method?

A)

Xamarin.forms

B)

Xamarin.android

C)

Xamarin.native

D)

None of the above

Correct Answer : Xamarin.native

Explaination : When we want to construct a distinct version of the same App for multiple platforms, we utilise Xamarin.native method.

12 .

____is a tool that allowed the developers to identify and track the issue with the apps in real-time?

A)

Xamarin.native

B)

Xamarin.forms

C)

Xamarin Profiler

D)

Xamarin Insights

Correct Answer : Xamarin Insights

Explanation : Xamarin insight is a tool that allowed developers to identify and track the issue with the apps in real time.

13 .

Which of the following file includes all of the information about the Android platform that an app requires to execute correctly?

A)

API file

B)

Manifest File

C)

Android File

D)

None of the above

Correct Answer : Manifest File

Explaination : The manifest file includes all of the information about the Android platform that an app requires to execute correctly.

14 .

What is the purpose of the Xamarin Test Cloud?

A)

To provide a marketplace for Xamarin applications

B)

To provide a cloud-based IDE for developing Xamarin applications

C)

To allow developers to test their applications on a variety of physical devices

D)

To provide a cloud-based database for storing Xamarin applications

Correct Answer : To allow developers to test their applications on a variety of physical devices

Explanation : The Xamarin Test Cloud is a cloud-based service that allows developers to test their applications on a variety of physical devices. This enables developers to identify and fix issues that may be specific to certain device types or operating system versions.

15 .

What is the purpose of the Xamarin Profiler?

A)

To provide a marketplace for Xamarin applications

B)

To analyze the performance of Xamarin applications

C)

To test Xamarin applications on a variety of physical devices

D)

To provide a cloud-based IDE for developing Xamarin applications

Correct Answer : To analyze the performance of Xamarin applications

Explanation : The Xamarin Profiler is a tool that enables developers to analyze the performance of their Xamarin applications. It provides detailed information on the memory usage, CPU usage, and other performance metrics of an application, allowing developers to identify and fix performance issues.

16 .

What is the purpose of the Xamarin Component Store?

A)

To provide a marketplace for Xamarin components and plugins

B)

To test Xamarin applications on a variety of physical devices

C)

To provide a cloud-based IDE for developing Xamarin applications

D)

To provide a cloud-based database for storing Xamarin applications

Correct Answer : To provide a marketplace for Xamarin components and plugins

Explanation : The Xamarin Component Store is an online marketplace where developers can browse and download reusable components and plugins for their Xamarin applications. These components and plugins can help developers save time and effort by providing pre-built functionality that can be easily integrated into their applications.

17 .

Which of the following is NOT a supported mobile operating system for Xamarin development?

A)

iOS

B)

macOS

C)

Android

D)

Windows Phone

Correct Answer : macOS

Explanation : While Xamarin does provide support for developing macOS desktop applications, it is not a supported mobile operating system for Xamarin development. Xamarin provides support for developing mobile applications for iOS, Android, and Windows Phone.

18 .

When a new Android project is established, several files are automatically added to the project. These default project files and directories are referred as ____?

A)

Config File

B)

Project Essential

C)

Android Resources

D)

None of the above

Correct Answer : Android Resources

Explaination : When a new Android project is established, several files are automatically added to the project. These default project files and directories are referred to as Android Resources.

19 .

Which of the following folder saves all of the photographs that you want to utilize in your program?

A)

Static folder

B)

Layout folder

C)

Main activity folder

D)

Drawable folder

Correct Answer : Drawable folder

Explanation : Drawable folder saves all of the photographs that you want to utilize in your program.

20 .

How many processes are included in an Android activity?

A)

2

B)

5

C)

7

D)

8

Correct Answer : 7

Explanation : There are 7 lifecycle processes in an Android activity.

* onCreate
* onStart
* onResume
* onPause
* onStop
* onRestart
* onDestroy

21 .

When the activity is first formed, which of the following process is invoked?

A)

onStart

B)

onResume

C)

onCreate

D)

onRestart

Correct Answer : onCreate

Explanation : When the activity is first formed, onCreate process is invoked.

22 .

When the action begins and becomes visible to the user, this process is known as ____?

A)

onStart

B)

onCreate

C)

onResume

D)

onRestart

Correct Answer : onStart

Explanation : When the action begins and becomes visible to the user, it is termed as onStart process.

23 .

Which of the following is NOT a benefit of using Xamarin for cross-platform mobile development?

A)

Native performance

B)

Code portability across all platforms

C)

Access to native APIs and UI components

D)

Easy integration with third-party libraries

Correct Answer : Code portability across all platforms

Explanation : While Xamarin does provide a degree of code sharing across multiple platforms, it is not possible to share 100% of the code across all platforms. Some platform-specific code may still be necessary to take full advantage of the native capabilities of each platform.

24 .

What is the purpose of the Xamarin Designer for iOS?

A)

To analyze the performance of iOS applications

B)

To provide a marketplace for iOS components and plugins

C)

To test iOS applications on a variety of physical devices

D)

To enable developers to design and preview iOS user interfaces in a visual editor

Correct Answer : To enable developers to design and preview iOS user interfaces in a visual editor

Explanation : The Xamarin Designer for iOS is a visual editor that enables developers to design and preview iOS user interfaces using a drag-and-drop interface. It provides a visual representation of the user interface and allows developers to quickly iterate on their designs without having to write code.

25 .

Which of the following is a key feature of Xamarin.iOS?

A)

A marketplace for iOS plugins and components

B)

A visual designer for creating iOS user interfaces

C)

Access to native iOS APIs and UI components

D)

A cloud-based testing platform for iOS applications

Correct Answer : Access to native iOS APIs and UI components

Explanation : Xamarin.iOS provides full access to the native iOS APIs and UI components, allowing developers to create fully native iOS applications using C# and the .NET framework. This enables developers to take full advantage of the native capabilities of iOS, while still using the familiar C# language and .NET framework.

26 .

Which of the following is a key feature of Xamarin.UWP?

A)

Access to native UWP APIs and UI components

B)

A marketplace for UWP plugins and components

C)

A visual designer for creating UWP user interfaces

D)

A cloud-based testing platform for UWP applications

Correct Answer : Access to native UWP APIs and UI components

Explanation : Xamarin.UWP provides full access to the native UWP APIs and UI components, allowing developers to create fully native UWP applications using C# and the .NET framework. This enables developers to take full advantage of the native capabilities of UWP, while still using the familiar C# language and .NET framework.

27 .

________ displays the stacks of data horizontally in rows.

A)

TableView

B)

ListView

C)

TupleView

D)

DatabaseView

Correct Answer : TableView

Explanation : TableView: TableView displays the stacks of data horizontally in rows. We use this control when we need more space for rich visualization of the item to be displayed.

28 .

Which of the following are the disadvantages of Xamarin Development?

A)

The apps created in Xamarin have a large file size

B)

The development of user interfaces in Xamarin is Time-Consuming

C)

Even apps share the code across the platform, but there is also a need for the developer to create the linkage in the OS, which is difficult for the user

D)

All of the above

Correct Answer : All of the above

Explanation : All of the above are the disadvantages of Xamarin Development.

29 .

Fresh MVVM is a super light MVVM framework which is designed specifically for Xamarin.Forms only

A)

Yes

B)

No

C)

Can Not Say

D)

None of the above

Correct Answer : Yes

Explanation : Yes, Fresh MVVM is a super light MVVM framework which is designed specifically for Xamarin.Forms only

30 .

_________ is the declaration of the namespaces on top of the XAML file.

A)

XAML main

B)

XAML namespace

C)

XAML header

D)

XAML constant

Correct Answer : XAML namespace

Explanation : XAML namespace is the declaration of the namespaces on top of the XAML file.

31 .

Which types of Built-in cells is a text cell which includes the image component in the left.

A)

TextCell

B)

EntryCell

C)

ImageCell

D)

SwitchCell

Correct Answer : ImageCell

Explanation : ImageCell: It is a text cell which includes the image component in the left.

32 .

Which of the following platforms is NOT supported by Xamarin?

A)

iOS

B)

Android

C)

Windows

D)

Linux

Correct Answer : Linux

Explanation : While Xamarin supports multiple platforms, including iOS, Android, and Windows, it does not currently support Linux. However, developers can use the Mono runtime, which is the underlying technology behind Xamarin, to run .NET applications on Linux.

33 .

Which of the following method is called after the activity has stopped, before starting again?

A)

onStart

B)

onCreate

C)

onRestart

D)

onResume

Correct Answer : onRestart

Explanation : onRestart method is called after the activity has stopped, before starting again.

34 .

Which of the following method is the final call before the activity is erased from memory?

A)

onStop

B)

onResume

C)

onCancel

D)

onDestroy

Correct Answer : onDestroy

Explanation : In onDestroy process, the final call before the activity is erased from memory.

35 .

Which of the following method is called when the activity is no longer visible to the user?

A)

onStop

B)

onDestroy

C)

onResume

D)

None of the above

Correct Answer : onStop

Explanation : When the activity is no longer visible to the user, onStop method is invoked.

36 .

How many types to create the Xamarin applications?

A)

4

B)

3

C)

2

D)

1

Correct Answer : 3

Explanation : Here, are the three ways to build the apps in Xmarin : Xamarin.Forms, Xamarin.Android and Xamarin.iOS.

37 .

What is the purpose of the Xamarin Live Player?

A)

To analyze the performance of Xamarin applications

B)

To test Xamarin applications on a variety of physical devices

C)

To provide a cloud-based IDE for developing Xamarin applications

D)

To allow developers to preview their Xamarin applications on a physical device without needing to build and deploy the application

Correct Answer : To allow developers to preview their Xamarin applications on a physical device without needing to build and deploy the application

Explanation : The Xamarin Live Player is a tool that allows developers to preview their Xamarin applications on a physical device in real-time, without needing to build and deploy the application. This enables developers to quickly test and iterate on their applications, speeding up the development process.

38 .

What is the purpose of the Xamarin Inspector?

A)

To analyze the performance of Xamarin applications

B)

To test Xamarin applications on a variety of physical devices

C)

To allow developers to debug and inspect their Xamarin applications in real-time

D)

To provide a cloud-based IDE for developing Xamarin applications

Correct Answer : To allow developers to debug and inspect their Xamarin applications in real-time

Explanation : The Xamarin Inspector is a tool that allows developers to inspect and debug their Xamarin applications in real-time, helping them identify and fix issues quickly. The Inspector provides a variety of tools for inspecting the user interface, debugging code, and monitoring performance.

39 .

Which of the following is not a benefit of using Xamarin for cross-platform development?

A)

Access to native device APIs and functionality

B)

Reduced development time and cost compared to native development

C)

Ability to share code between iOS and Android applications

D)

Ability to create user interfaces using a shared XAML markup language

Correct Answer : Reduced development time and cost compared to native development

Explanation : While Xamarin can help reduce development time and cost compared to developing separate native applications for each platform, it is not necessarily faster or cheaper than developing a single native application. However, Xamarin does provide other benefits such as the ability to share code, access to native device APIs, and a shared XAML markup language for creating user interfaces.

40 .

Which of the following is a view technique that we use for displaying a message or output in a little pop-up window?

A)

Text ()

B)

TextView ()

C)

Make.Text ()

D)

Toast.MakeText()

Correct Answer : Toast.MakeText()

Explaination : Toast.MakeText() is a view technique that we use for displaying a message or output in a little pop-up window.

41 .

____ is a collection handler that reads data from a list collection and either returns it as a view or shows it on the screen?

A)

ArrayAdapter

B)

MakeList

C)

ListAdapter

D)

ArrayHandler

Correct Answer : ArrayAdapter

Explaination : ArrayAdapter is a collection handler that reads data from a list collection and either returns it as a view or shows it on the screen.

42 .

The ____layout is used to display only one item?

A)

Frame layout

B)

Vertical Layout

C)

Relative Layout

D)

Horizontal Layout

Correct Answer : Frame layout

Explanation : The frame layout is used to display only one item.

43 .

Which of the following widget is used to display the date?

A)

Date

B)

Date Picker

C)

Time Picker

D)

Date Display

Correct Answer : Time Picker

Explanation : The date Picker widget is used to display the date.

44 .

A ____ is a widget that allows you to choose one choice from a list. It is similar to a dropdown/combo box?

A)

Spinner

B)

Rolled

C)

Drop down

D)

Main menu

Correct Answer : Spinner

Explaination : A spinner is a widget that allows you to choose one choice from a list. It is similar to a dropdown/combo box.

45 .

What is XAML?

A)

Extensible markup language

B)

Extensile markup language

C)

Existing markup language

D)

None of the above

Correct Answer : Extensible markup language

Explanation : XAML means Extensible markup language.

46 .

_____is a stand-alone integrated development environment (IDE) for building cross-platform mobile applications based on the open-source project Monodevelop?

A)

Xamarin analyze

B)

Xamarin Profiler

C)

Xamarin Insights

D)

Xamarin Studio

Correct Answer : Xamarin Studio

Explaination : Xamarin Studio is a stand-alone integrated development environment (IDE) for building cross-platform mobile applications based on the open-source project Monodevelop.

47 .

Which of the following works on both Windows OS X environments?

A)

Visual Studio

B)

Xamarin studio

C)

Both (A) and (B)

D)

None of the above

Correct Answer : Xamarin studio

Explanation : Xamarin Studio works on both Windows OS X environments.

48 .

A ____is a user interface element that shows scrollable lists of things?

A)

Module

B)

TextView

C)

Grid View

D)

List view

Correct Answer : List view

Explanation : A Listview is a user interface element that shows scrollable lists of things.

49 .

A ____is a type of view group that allows programs to display material in a two-dimensional, scrollable grid?

A)

Module

B)

List view

C)

Grid View

D)

TextView

Correct Answer : Grid View

Explanation : A gridView is a type of view group that allows programs to display material in a two-dimensional, scrollable grid.

50 .

_______is a mechanism for synchronizing the data source with the user interface.

A)

Data binding

B)

Array adapter

C)

Project portables

D)

None of the above

Correct Answer : Data binding

Explanation : Data Binding is a mechanism for synchronizing the data source with the user interface.

51 .

Xamarin.Forms uses ______.

A)

XAML

B)

MVVM

C)

Both (A) and (B)

D)

None of the above

Correct Answer : Both (A) and (B)

Explanation : Xamarin.Forms use MVVM and XAML both.

52 .

Depending on the platform support, which of the following can be used to display Websites, HTML strings, Documents, and Local Files in Xamarin?

A)

Web view

B)

List view

C)

TextView

D)

Grid View

Correct Answer : Web view

Explaination : Depending on the platform support, webview can be used to display Websites, HTML strings, Documents, and Local Files in Xamarin.

53 .

Which company created mono?

A)

Google

B)

Xamarin

C)

Microsoft

D)

None of the above

Correct Answer : Xamarin

Explanation : Xamarin created Mono.

54 .

______is a ViewModel attribute that allows you to use the command interface.

A)

ICommand

B)

CommandInter

C)

Commands_interface

D)

None of the above

Correct Answer : ICommand

Explanation : ICommand is a ViewModel attribute that allows you to use the command interface.

55 .

A ____ is a tiny individual element that represents a single ListView or Table item.

A)

Tabs

B)

Cells

C)

ViewTable

D)

ViewCell

Correct Answer : ViewCell

Explanation : A ViewCell is a tiny individual element that represents a single ListView or Table item.

56 .

Among MVVMCross and MVVMlight which of the following is a .NET cross-platform MVVM framework?

A)

MVVMlight

B)

MVVMCross

C)

Can not say

D)

None of the above

Correct Answer : MVVMCross

Explaination : MVVMCross is a .NET cross-platform MVVM framework.

57 .

In Xamarin, ____Android gives access to all native Android APIs?

A)

Mono

B)

Android

C)

Data binding

D)

None of the above

Correct Answer : Mono

Explanation : In Xamarin, Mono Android gives access to all native Android APIs.

58 .

What is the purpose of the Xamarin.Forms Previewer?

A)

To analyze the performance of Xamarin applications

B)

To test Xamarin applications on a variety of physical devices

C)

To provide a visual preview of Xamarin.Forms user interfaces

D)

To provide a cloud-based IDE for developing Xamarin applications

Correct Answer : To provide a visual preview of Xamarin.Forms user interfaces

Explanation : The Xamarin.Forms Previewer is a tool that allows developers to preview their Xamarin.Forms user interfaces in real-time, without needing to run the application. This enables developers to iterate on their user interfaces more quickly, as they can see the changes they make in real-time.

59 .

Which of the following layout is used in Xamarin, When UI components must be positioned horizontally or vertically?

A)

Frame

B)

Stack Layout

C)

ScrollView

D)

ContentView

Correct Answer : Stack Layout

Explaination : Stack layout in Xamarin is used when UI components must be positioned horizontally or vertically.

60 .

How many code-sharing techniques does Xamarin.forms provides?

A)

2

B)

3

C)

4

D)

5

Correct Answer : 2

Explanation : There are two methods of sharing the code between the cross-platform applications:

* Portable Libraries (PCL)
* Shared Projects

61 .

Which of the following view control displays the stacks of data vertically?

A)

ListView

B)

TableView

C)

Can Not Say

D)

None of the above

Correct Answer : ListView

Explanation : ListView control displays the stacks of data vertically.

62 .

Which of the following view control displays the stacks of data horizontally?

A)

ListView

B)

TableView

C)

Can Not Say

D)

None of the above

Correct Answer : TableView

Explanation : TableView control displays the stacks of data horizontally.

63 .

Data Binding is based on ____?

A)

MVC

B)

MVP

C)

MVVM

D)

None of the above

Correct Answer : MVVM

Explanation : Data Binding is based on MVVM (Model-View-ViewModel) Architecture.

64 .

How many types of pages are available in Xamarin Forms?

A)

2

B)

3

C)

4

D)

6

Correct Answer : 6

Explanation : There are 6 types of pages available in Xamarin Forms: Carousel Page, Content Page, MasterDetail Page, Navigation Page, Tabbed Page, and Template Page.

65 .

Assists developers in creating a single cross-platform API for their mobile applications, which can be accessed via common code?

A)

Xamarin Studio

B)

Xamarin Profiler

C)

Xamarin Insights

D)

Xamarin.Essentials

Correct Answer : Xamarin.Essentials

Explaination : Xamarin.Essentials assist developers in creating a single cross-platform API for their mobile applications, which can be accessed via common code.

66 .

Which of the following is used in a situation where Less platform-specific code is required?

A)

Xamarin.forms

B)

Xamarin.native

C)

Can Not Say

D)

None of the above

Correct Answer : Xamarin.forms

Explanation : Xamarin.forms are used in a situation where Less platform-specific code is required.