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Mobile Testing Interview Questions
Mobile Testing is the process by which applications for modern mobile devices are tested for functionality, usability, performance, consistency, reliability and much more. 
 
There are 2 types of mobile testing :
 
1.  Automate testing
2.  Manual testing
Following are the various types of mobile operating systems :
 
Android OS : It was developed by Google Inc.

iOS : It was developed by Apple Inc.

Series 40 [S40] OS : It was developed by Nokia Inc.

BlackBerry OS : It was developed by BlackBerry Limited.
Mobile internet usage continues to rise even as desktop/laptop internet usage is declining, a trend that has continued unabated for years. As more and more users spend an increasing amount of their time on mobile devices, it’s critical to provide a good experience on your mobile apps.
 
If you’re not testing the mobile experience your users are receiving, then you can’t know how well your application serves a large and growing portion of your users. Failing to understand this leads to dreaded one-star app reviews and negative feedback on social media.
 
Mobile app testing ensures your mobile experience is strong, no matter what kind of app you’re using or what platform it is developed for.
There are three general categories of mobile applications that you may need to test today :

* Native Applications.
* Web Applications.
* Hybrid Applications.
 
Native Applications : Native Apps are designed specifically for a particular mobile platform (today this typically means either Android or iOS) and are generally downloaded and installed via an app store like Apple’s App Store or Google’s Play Store. This includes both pure native apps built on Java/Kotlin for Android or Objective-C/Swift for iOS, as well as cross-platform native applications built with frameworks like ReactNative, Flutter and NativeScript.

Web Applications : Web Apps are designed to be accessed on a mobile browser. Web apps can be either a responsive version of a website or a progressive web app (PWA), which adds additional mobile-friendly features.
 
Hybrid Applications : Hybrid Apps are designed as a compromise between native and web apps. Hybrid apps can be installed via app stores just like native apps and may have some native functionality, but at least partially rely on operating essentially as web apps wrapped in a native shell.
Here are 10 different ways of testing mobile applications :
 
Functional Testing : Tests the functioning and flow of apps.

Usability Testing : Tests the user’s experience with apps.

Compatibility Testing : Tests the compatibility of apps on different devices, networks, and hardware.

Security Testing : Tests the application's ability to keep the user’s personal information safe and confidential.

Performance Testing : ensures the app does not malfunction.

Installation Testing : Tests the installation and update process of apps.

Localization Testing : Tests apps to align geographical and cultural aspects with the end-users to ensure localization so that consumers don’t skip past it.

Mobile-device testing : Testing apps on mobile devices for better functioning.

Manual Testing : checking the functioning of the app manually to identify errors in the interface.

Automated training : used in tedious situations where manual testing is not enough, automated testing ensures quality and faster release of products.
Mobile devices are usually handheld computers. There are mainly two types of mobile devices which later have many subtypes depending on their characteristics, such as physical dimensions, hardware, and software capabilities:
 
The mainly two types of mobile devices are : 
 
* Tablets
* Smartphones mobile
The main differences between tablets and smartphones based on their features :
 
Tablets : A tablet is a type of portable computing device. Unlike the traditional computer, the tablet doesn't have a keyboard or mouse; however, the entire screen is touch-sensitive. This is mainly used as a smaller substitute for laptop or reading devices, and it is generally larger than smartphones in size.
 
Smartphones : A smartphone is a powerful mobile phone which provides a lot of additional features such as a great camera, watch, calculator, calendar, online games, and many other software applications benefits as compared to normal mobile phones. It is mainly designed to run a wide variety of applications along with providing basic phone services. It is generally smaller in size than a tablet.
It is commonly called the Instrumentation Test Runner and is basically a runner which is responsible for smoothly running the test case on an application package. The tools that offer API and the SDK tools are present in this runner and it is responsible for writing the programs that control the Android gadgets. 
The use of mobile apps is becoming quite common and currently millions of apps are developed each day across the globe. Although they have different purposes and use, a few of the features are quite essential in all of them. This includes:
 
* Reliability
* Compatibility with other technologies
* Scalability
* Efficiency
* Mode of operation
* Open Source Technology
* Wider Adaptability
* Fast operations
Commonly used defect tracking tools used for mobile testing are :
 
* JIRA.
* Redmine.
* FogBugz.
* Bugzilla.
* HP ALM.
* Rally.
* YouTrack.
* Mantis.
* Trac.
* Trello.