40+ Top Mobile Testing Interview Questions (2022)

Top Mobile Testing Interview Questions and Answers

1. Define the application Testing Process.

Application Testing Process is the procedure to test the mobile software using mobile testing techniques and skills. A specialized software tester does this. It is a continuous process starting from the development of the software. Software is tested for its performance, utility, and reliability.

2. List different types of mobile testing.

There are ten types of app testing

1. Installation testing
2. Functional testing
3. Compatibility testing
4. Usability testing
5. Acceptance testing
6. Performance testing
7. Security testing
8. Localization testing
9. Interruption testing
10. Recovery testing

3. What are the benefits of App testing?

The benefits of app testing are

• It makes the app bugs-free and smoothes for use.
• It improves the appearance and user experience.
• It increases the market for the app.

4. Who does the app test?

Mostly app developers test the app for performance. They have a set of questions to be checked. Sometimes, stakeholders like management, owners, users, etc., are also involved in the process.

5. What mistakes should be avoided during app tests?

The tester must-

• Not start without an objective. Know the requirements.
• Lay a plan for the testing procedure.
• Not test everything together. It can lead to confusion.
• Run the test on actual devices and not only on simulators or emulators.
• Not focus on the just interface. Overall testing should be done.

6. What does BrowserStack do?

BrowserStack helps in-app testing on real devices. It provides App Live and App Automate for on-demand access to real devices. It provides access to thousands of real Android and iOS devices for automated and manual tests.

7. What is the difference between simulators and emulators?

8. What are the advantages of using a real mobile device for testing?

There are various advantages of using a real device

• Testing on the device that will be used later avoids any errors that might arise while using a simulator.
• Using a real device validates the user interface.
• Real devices improve performance and reliability.
• It improves hardware and sensory operations.

9. What are WAP and Web testing?

WAP testing is the testing of wireless application protocols used in network applications. But, Web testing is the testing of web applications like websites.

10. List a few Android Testing Strategies

Few testing strategies are

• Unit Test
• Integration Test
• Operation Test
• System Test

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11. What are possible bugs found during mobile testing?

Few bugs are

• Block - unable to do anything unless you reboot your device 
• Major - a particular feature function doesn’t work
• Critical – device system crashes while testing 
• Minor – GUI bugs

12. Describe A/B testing on iOS devices 

It has three steps

1. Configuration - It prepares two versions of the iOS app (A&B) and tests metric
2. Testing - Testing iOS versions on devices simultaneously
3. Analyzing - Selecting better versions

13. What are the features of monkey tools?

There are four basic features

• Basic configuration options
• Operational constraints
• Event types and frequencies
• Debugging options

14. When should one choose manual testing?

• If an application needs testing a second time
• If the application has a new function

15. When does one need to automate testing?

• When regression tests need to be repeated
• When the app is tested for complex situations

16. What problems can occur during mobile testing in cloud computing?

Various problems can arise

• High costs
• Network connection problems
• Subscription model
• Automation is time-consuming
• Automation needs to be used within the framework

17. How can one test CPU usage on a device?

Various apps can be installed from the app store that records the information about the operating processes on the device. Some apps are- CPU Stats, CPU-Z, CPU Monitor, etc.

18. On which networks app process testing can be done?

Testing can be done using 2G, 3G, 4G, and Wifi. It is best to check the application performance on 2G.

19. What are the extensions for Android and iOS files?

• Android

.apk (Android application package)

• iOS

.ipa 

20. What features cannot be tested on the emulator/simulator?

• Device camera
• Device battery
• Distractions (calls or SMS)
• Device memory

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21. Why is mobile application testing an important part of businesses today?

Since mobile applications have become a part of people’s everyday lives, the applications developed for any specific purpose should be tested from time to time to keep up with industry standards. And application testing is among the crucial parts of this process.

• Mobile testing helps identify aspects of the application that need improvements before releasing the app. This ensures the application performs well.
• Businesses do better when users have a good experience using the application. With testing, issues can be fixed in time to avoid bad user experiences that may reduce ratings for your application. Rigorous testing of the applications leads to increased downloads and valuable referrals.
• Testing helps ensure the application is well-aligned with your business goals and customer expectations while following the best industry practices.

22. What is the difference between mobile device testing and mobile application testing?

While mobile device testing is performed to keep a check on the quality of the device, mobile application testing is performed to ensure the application runs well and has no glitches, performance-related issues, or bugs when it runs on mobile phones. Mobile device testing entails testing both the hardware and software. However, mobile application testing includes testing aspects, such as performance, functionality, security, usability, and load among others.

23. What are the different approaches for testing mobile applications?

The two approaches used for testing mobile applications are as follows-

Manual Testing – This type of testing involves professionals and experts who perform testing to ensure a top-notch user experience. A manual process is quite time-consuming and detecting bugs can take longer time.

Automated Testing – As the name implies, automated testing uses tools to enhance the speed and accuracy when finding defects, errors, or bugs.

24. What are the types of automation tools available for mobile devices?

There are two major types of automation tools that can be used for mobile devices: object-based mobile testing tools and image-based mobile testing tools. object-based mobile testing tools are primarily used for Android devices and this approach is not dependent on the screen size. Jama solution and Ranorex are some examples of object-based mobile testing tools. Image-based mobile testing tools rely on screen coordinates to generate automation scripts. Some examples of object-based testing tools are Egg Plant, RoutinBot, and Sikuli among others.  

25. What are the different types of mobile applications?

Following are the different types of mobile applications-

• Native Applications – These applications are designed exclusively for a particular operating system like Android or iOS. This means an iOS native application cannot be installed on an Android phone.
• Web Applications – Web applications, unlike other applications, are not available on the Google play store or the Apple app store to be installed. Instead, you can only access and use them on your web browsers, such as Chrome, Firefox, Safari, etc.
• Hybrid Applications – These applications are web-based and behave like native applications.

26. What are the most common challenges encountered by testers when performing mobile testing?

Testers may find it extremely challenging to test on multiple operating systems and their different versions. Further, testing the functionalities of an application across different mobile devices, such as smartphones, tablets, handsets, etc. can be arduous. Screen size fragmentation and testing across mobile networks are also among the challenges that tester face.

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27. What are the common bugs found during the mobile testing process?

Some of the common bugs that might be found during mobile testing are as given below-

• Critical Bugs – These bugs can result in a complete shutdown of the system.
• Block Bugs – Block bugs can make it extremely challenging for testers to fix other bugs.
• Major Bugs – Major bugs are capable of collapsing major parts of your application.
• Minor Bugs – Your application may start to behave in an undesired and unexpected way in the presence of a minor bug. However, it cannot cause a system failure.

28. What is mobile penetration testing?

With the extensive use of mobile applications in every industry, there is more scope for hackers to attack the application. Mobile penetration testing aims at ensuring the application has strong security by detecting security flaws. The elements tested include the application as a whole, APIs or web services that provide and exchange data, application network interfaces, server hosting of the API, and user data.

29. What is AWS in testing?

AWS is the abbreviation for Amazon Web Service, which is a mobile application testing service. With AWS, you can test your mobile app across various desktop browsers and devices to make sure your app is of high quality. It allows you to run your tests on several desktops simultaneously or devices to speed up the execution of your test suite.

30. What does mobile security testing include?

Mobile security testing involves testing your mobile application for authorization, authentication, hacking vulnerabilities, data security, session management, etc. When you test all these aspects of your app, you can be completely sure that your application is free of any potential loopholes.

31. What is cloud-based mobile testing?

When you use an online cloud platform to test your mobile application as opposed to an on-premise environment, the testing process is called cloud-based testing. All the devices are available on a single platform when you perform cloud-based testing, which enables all the testers to stay connected and access these devices easily.

32. What are the common challenges during cloud computing mobile testing?

Cloud-computing mobile testing also comes with an array of challenges, some of which are as follows-

• While cloud-based services are generally thought to be cost-effective, they might end up costing more.
• Cloud services also require an active internet connection. Therefore, the testing team might encounter internet connectivity issues.
• Cloud-computing mobile testing can be more time-consuming and challenging as automation testing is image-based.
• Cloud testing may not be capable of testing every feature that you release for your application. Therefore, it may not offer adequate testing coverage.
• You cannot use automation outside of the framework with cloud-computing mobile testing.

33. What is the Android testing framework and what are some of its frameworks?

The Android testing framework is an open-source framework. It is a very commonly used framework to test Android applications and it can be used for recording user interface tests for Android devices and unit devices. The Android testing framework has three segments – Application Package, Instrumentation Test Runner, and Test Package. Some of the most popular Android testing frameworks are Detox, Poppy, Express, UI Automator, and Calabash.

34. What are the best practices for Android testing?

Here are some of the best practices when performing Android testing-

• Testers should prepare test cases simultaneously while writing the code.
• There should be storage and detailed documentation to ensure reusability.
• Whenever there is a change to the code, tests should be run immediately along with the continuous implementation of integrations.
• Testers should avoid rooting the smartphone and use emulators for obtaining accurate results.

35. What is a Robo-electric testing framework?

A robotic testing framework is used to tackle certain challenges, such as using an emulator or testing an Android app on a device, which can demand a lot of time and effort. The Robo-electric framework allows you to directly run the Android tests on a desktop. Therefore, there is no need to set up anything additional for running tests within the development environment. The process becomes a lot more reliable and prompter. 

36. Explain a test case runner.

A test case runner is a software tool that makes it possible for testers to test their mobile applications. A test case runner helps by acting as an environment to represent both the device and the end-users. It generates a very close simulation of the user environment and the functions and features of the application are tested in a manner as if real humans were using it. It helps find out the readiness of an application for launch.

37. What are Test Scenarios in mobile testing?

Test Scenarios are detailed documents of test cases and simple sets of functionalities that are open to automation and manual testing in a website or a mobile application. It helps understand both positive and negative characteristics of the website or application while testing the application from a user’s perspective.

38. What are the primary criteria to consider when planning to perform end-to-end mobile testing?

An end-to-end testing process involves testing all the aspects of the application from beginning to end. It helps ensure that the application’s flow behaves as planned and expected. Throughout end-to-end testing, it is crucial to consider certain requirements-

• Is the application successfully installed across different models of gadgets and versions of operating systems?
• Does the application have a smooth launch with and without a network?
• What orientations are supported by the application?
• What are the application’s response speed and time when it is used?

39. What is a web service?

Web services are a component of software used for performing tasks. it acts as an interface between two programs.

40. Can we use QTP/UFT for mobile automation testing?

Both can be used with the help of Seetest add-in. 

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FAQs

1. What are the stages of mobile testing?

The stages of mobile application testing are:

1. Preparation and Strategy Formation 

This is the foundation step where planning for app testing is laid. It involves finding resources, target devices, step-by-step procedures, achievable targets, etc.

2. Identifying Essential Testing Types

Since the applications are run on different interfaces, they must be compatible and easy to use. Hence, automated and cloud simulator testings are done to ensure this manual.

3. Designing Test Script and Test Case

Test scripts or cases are steps that help in application test execution. These are necessary for the smooth functioning of the application.

4. Setting Testing Environment 

The testing environment includes the codes and devices used for app testing. Setting an appropriate environment is necessary for proper testing.

5. Automated and Manual Testing 

The functioning of the app is tested in manual and automated ways. It helps in finding errors and rectifying them for better performance.

6. Usability and User Interface Testing 

Usability refers to the simplicity of the interface and its use. The app is tested for efficient use by the user.

7. Compatibility Testing 

Compatibility refers to acceptance by different browsers, devices, and networks to run the application. Good compatibility means fewer bugs.

8. Performance Testing 

Performance testing is done under different conditions and usages. It confirms the working abilities of the app.

9. Security Testing 

Security testing is done to ensure the app's safety from unauthorized access. It reduces the risk of outside intervention.

10. Beta testing 

Beta testing is checking the app's stability and identifying errors and their solutions before releasing it for use.

2. Which tool is used for mobile testing?

Some prominently used tools for testing are

• XCUITest
• Robot Framework
• Espresso
• TestComplete
• Appium
• Xamarin.UITest

3. What is an emulator in mobile testing?

An Emulator is a virtual device that mimics a real device (hardware or OS) to test the app.

4. What is the purpose of mobile testing?

A vast number of users use mobile apps. To reach maximum users, the app must be efficient enough. Hence, app testing becomes necessary. It will fix the bugs and errors and make it compatible and easier to use.

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Conclusion

Now that you have gone through the most important and commonly asked mobile testing interview questions and answers, you can now go ahead and answer the interviews confidently. If you are looking to further enhance your skills in the software development domain, then you can go ahead and enroll in Simplilearn’s Post Graduate Program in Full Stack Web Development which is created in collaboration with Caltech CTME. This course can help you hone the skills and make you job-ready at the end of just 6 months.

If you have any doubts or queries regarding the article, feel free to post them in the comments below and our team will get back to you at the earliest.