Preparing for a mobile application testing interview? With the rising demand for high-quality mobile apps, companies are actively hiring skilled testers. To help you prepare, we’ve gathered 35+ essential mobile application testing interview questions and answers.
These questions cover key concepts, testing techniques, and best practices, giving you the confidence to ace your interview.
Fun Fact: The mobile app testing market is expected to grow to $13.5 billion by 2026, creating more job opportunities in this field.
Mobile Application Testing Interview Questions for Freshers
Here are some common mobile app testing interview questions and answers for freshers:
- What is mobile application testing, and why is it important?
Mobile application testing is the process of evaluating an app’s functionality, performance, usability, and security on different mobile devices and operating systems. It helps identify bugs, improve user experience, and confirm that the app works smoothly under various conditions.
- What are the different types of mobile applications?
There are three main types of mobile applications:
- Native apps – Built for a specific platform (Android or iOS) using platform-specific languages like Swift or Kotlin.
- Web apps – Accessed through a browser and do not require installation.
- Hybrid apps – A combination of native and web apps, developed using frameworks like Ionic or React Native.
- What are the key differences between mobile and web application testing?
- Devices – Mobile apps run on different screen sizes and hardware, while web apps run on browsers.
- Network conditions – Mobile apps must be tested under varying network speeds, unlike web apps that rely on stable internet.
- Installation and updates – Mobile apps need to be installed and updated, while web apps load instantly.
- What are the common challenges in mobile application testing?
- Device fragmentation – Apps must work on multiple devices, screen sizes, and OS versions.
- Network issues – Apps need to function in different network conditions like 2G, 3G, 4G, 5G, and Wi-Fi.
- Battery consumption – Some apps drain the battery quickly, leading to user dissatisfaction.
- Security concerns – Protecting sensitive user data from vulnerabilities is critical.
- What is the difference between functional and non-functional testing in mobile apps?
- Functional testing checks whether the app behaves as expected, covering UI, buttons, navigation, and features.
- Non-functional testing focuses on performance, security, usability, and compatibility.
Mobile App Testing Interview Questions for Experienced Candidates
Let’s go through important mobile application testing interview questions and answers for experienced candidates:
- How do you test a mobile application for different network conditions?
“I test under varying network conditions by simulating different speeds, such as Wi-Fi, 5G, 4G, and 3G. I use tools like Network Link Conditioner and Charles Proxy to analyze performance under limited connectivity, slow speeds, and intermittent loss. Testing includes checking how the app handles reconnections, offline mode, and data sync.”
- What strategies do you use for testing mobile applications on multiple devices?
“I use a combination of real devices and cloud-based testing platforms like BrowserStack or Sauce Labs. I categorize devices based on OS versions, screen sizes, and hardware specifications. I also conduct regression testing across different environments to detect compatibility issues.”
Mobile Application Testing Interview Questions for 2 Years Experienced
If you have around 2 years of experience, you might come across such mobile application testing interview questions:
- How do you handle memory leaks in a mobile application?
“I use profiling tools like Android Studio’s Memory Profiler and Xcode’s Instruments to detect memory leaks. I monitor app performance by checking object allocations and garbage collection. If I find a leak, I analyze the code and optimize it by releasing unused objects and avoiding memory-holding static references.”
- What tools have you used for mobile app testing, and how do they help?
“I have worked with Appium for automation testing, Charles Proxy for network analysis, JMeter for performance testing, and Firebase Test Lab for cloud testing. These tools help in automating repetitive tasks, detecting API failures, checking app performance, and running tests on multiple devices.”
Mobile Application Testing Interview Questions for 3 Years Experienced
These are common mobile application testing interview questions for candidates with 3 years of experience:
- How do you test a mobile app’s performance under high user load?
“I use performance testing tools like JMeter and LoadRunner to simulate thousands of virtual users accessing the app simultaneously. I monitor response time, CPU usage, memory consumption, and API call efficiency to identify bottlenecks. I also conduct stress testing to see how the app behaves under peak traffic.”
- What are some best practices for UI and UX testing in mobile apps?
“I check the app’s layout across different screen sizes, validate touch interactions, and verify navigation consistency. I perform usability testing by gathering user feedback and testing the app with real users to understand their experience. I also check for accessibility compliance to make the app usable for all users.”
Also Read - Top 20 JMeter Interview Questions and Answers
Mobile Application Testing Interview Questions for 4 Years Experienced
- What is compatibility testing in mobile apps, and how do you perform it?
“Compatibility testing guarantees that the app works across different devices, OS versions, and screen resolutions. I perform it by testing on real devices and cloud-based services. I validate layout responsiveness, API behavior, and third-party integrations across various configurations.”
- How do you identify and debug crashes in a mobile application?
“I use crash reporting tools like Firebase Crashlytics and Bugsnag to capture crash logs. I analyze stack traces, error messages, and user actions leading to the crash. If needed, I reproduce the issue on a test device, modify the code, and retest to confirm the fix.”
Also Read - Top 30+ LoadRunner Interview Questions and Answers
Mobile Application Testing Interview Questions for 5 Years Experienced
This is one of the most common mobile application testing interview questions for 5 years experienced candidates.
- How do you test a mobile application for backward compatibility?
“I test the app on older OS versions and previous device models to check for compatibility issues. I verify UI responsiveness, API compatibility, and deprecated feature handling. If an issue arises, I adjust configurations or use alternate coding methods to support older systems.”
- What are the most critical factors to consider when testing mobile payments?
“I verify transaction security, payment gateway integration, and response time. I test different payment methods like credit cards, digital wallets, and UPI. I also perform testing under failed transactions, network interruptions, and refund scenarios to confirm a smooth user experience.”
Tricky Interview Questions on Mobile App Testing
Here are some tricky interview questions on mobile app testing with answers:
- How would you test a mobile app with no access to its source code?
“I would perform black-box testing by interacting with the app as an end user. I would check UI elements, functionality, performance, and security. I would analyze network requests using tools like Charles Proxy or Wireshark to monitor API calls and responses. If the app is installed on Android, I would use ADB commands to gather logs and detect crashes. For iOS, I would check system logs using Xcode’s Console.”
- How do you test a mobile application that relies on GPS and location services?
“I would test the app by simulating different GPS locations using tools like Android Studio’s Emulator and Xcode’s Location Simulation. I would check how the app behaves when GPS is disabled or inaccurate. Additionally, I would test real-time tracking, geofencing, and different location updates under weak signal conditions.”
Advanced Mobile Software Testing Interview Questions
These are some advanced mobile software testing interview questions and answers:
- How do you perform security testing on a mobile application?
“I would test for vulnerabilities like data leaks, authentication flaws, and insecure storage. I would inspect API requests to check for unencrypted data and weak authentication. I would use tools like Burp Suite to identify security loopholes and OWASP ZAP to scan for vulnerabilities. I would also check session handling, token expiration, and protection against SQL injection and XSS attacks.”
- What are the key differences between testing Android and iOS applications?
- Device Fragmentation – Android apps must work on many different devices, whereas iOS apps have fewer variations.
- App Installation – Android allows direct APK installation, while iOS requires provisioning profiles or TestFlight.
- Testing Tools – Android apps use Espresso and UI Automator, while iOS apps use XCTest and XCUITest.
- Security Restrictions – iOS apps have stricter sandboxing rules, making debugging more restrictive than on Android.
Mobile Device Testing Interview Questions
You might also come across mobile device testing interview questions like these:
- What factors should be considered while testing on different mobile devices?
- Screen sizes and resolutions – Checking UI responsiveness across different devices.
- Operating system versions – Ensuring compatibility with older and newer OS versions.
- Performance differences – Testing on high-end and low-end devices.
- Battery consumption – Evaluating power usage on different devices.
- How do you test an app for battery consumption?
“I monitor battery usage by running the app under different scenarios and tracking power drain using tools like Android Studio’s Battery Historian and iOS Instruments’ Energy Log. I check for excessive background activity, unnecessary wake locks, and high CPU usage.”
Web Based Application Testing Interview Questions
Here is a list of common web application testing interview questions and answers.
- What are the key differences between mobile web testing and desktop web testing?
- Screen size – Mobile web apps must adapt to smaller screens.
- Touch interactions – Mobile users interact through taps and gestures rather than a mouse.
- Network variability – Mobile apps face fluctuating network conditions, unlike stable desktop connections.
- Browser compatibility – Mobile apps must work on multiple mobile browsers like Chrome, Safari, and Firefox.
- How do you test a responsive web application?
This is one of the most important web app testing interview questions.
“I test the app using different screen resolutions and orientations. I use browser developer tools to simulate various devices. I also test on actual mobile devices to verify layout, text readability, and touch interactions.”
Mobile Automation Testing Interview Questions
Let’s go through the commonly-asked mobile automation interview questions and answers:
- What are the benefits of using automation for mobile app testing?
- Faster testing – Automation reduces execution time for repetitive tests.
- Better coverage – Automated tests can run on multiple devices and OS versions.
- Early bug detection – Continuous testing helps find issues earlier in development.
- Reduced manual effort – Automation eliminates repetitive manual tasks, allowing testers to focus on critical issues.
- What are the common challenges in mobile automation testing?
- Device fragmentation – Automating tests across multiple devices and OS versions is difficult.
- UI changes – Frequent app UI updates may break test scripts.
- Handling gestures – Automating touch gestures like swipes and pinches can be tricky.
- Performance testing – Automated tools often struggle to test battery usage and CPU load accurately.
Also Read - Top 25+ Performance Testing Interview Questions and Answers
Mobile Automation Appium Interview Questions
Here are Appium automation interview questions and answers for mobile app testing:
- What is Appium, and how does it work?
Appium is an open-source automation tool for mobile applications. It allows testers to write scripts using languages like Java, Python, and JavaScript. It works by sending automation commands to a mobile device through the WebDriver protocol, interacting with elements just like a user would.
- How do you handle gestures in Appium?
“I use Appium’s TouchAction class to automate gestures like tap, swipe, and scroll. For Android, I use UiAutomator2, and for iOS, I use XCUITest. If needed, I customize actions by providing start and end coordinates for precise interactions.”
Also Read - Top 20+ Dynatrace Interview Questions and Answers
Mobile App Manual Testing Interview Questions
You might also come across manual mobile application testing interview questions like these:
- How do you perform exploratory testing on a mobile app?
“I explore the app without predefined test cases, focusing on different scenarios, navigation flows, and potential edge cases. I test various user interactions, such as swipes, taps, and screen rotations. I also switch between networks, background the app, and check error handling. This helps identify usability issues and unexpected behaviors.”
- What types of defects are commonly found in mobile app manual testing?
- UI issues – Misaligned elements, overlapping text, and broken layouts on different screen sizes.
- Performance problems – Slow loading, crashes, or high memory usage.
- Functionality bugs – Features not working as expected, incorrect validations, and app freezes.
- Network-related issues – App failure in low or no network conditions.
- Security vulnerabilities – Weak authentication and data exposure.
Mobile Application Security Testing Interview Questions
Here are some security-related mobile application testing interview questions and answers:
- What are the common security risks in mobile applications?
- Insecure data storage – Storing sensitive information in plain text.
- Weak authentication – Allowing weak passwords or missing multi-factor authentication.
- Unprotected API calls – APIs exposing user data without proper authentication.
- Code injection – Allowing malicious inputs that compromise app security.
- Session hijacking – Weak session management leading to unauthorized access.
- How do you perform penetration testing for a web application?
This is one of the most important web application security testing interview questions.
“I start with reconnaissance to gather information about the app’s endpoints and technologies used. I then test for vulnerabilities like SQL injection, cross-site scripting (XSS), and broken authentication using tools like OWASP ZAP and Burp Suite. I also analyze HTTP requests and responses for security flaws. After identifying weaknesses, I document them and suggest fixes.”
iOS Mobile Testing Interview Questions
Here are some common iOS mobile app testing interview questions and answers:
- What are the key differences between testing an iOS app and an Android app?
- App Distribution – iOS apps require TestFlight, while Android apps can be tested using APKs.
- Automation Tools – iOS uses XCTest and XCUITest, while Android uses Espresso and UI Automator.
- Security Restrictions – iOS apps run in a stricter sandbox environment.
- UI Differences – iOS apps follow Apple’s Human Interface Guidelines, while Android follows Material Design.
- What is XCTest, and how is it used for iOS app testing?
XCTest is Apple’s framework for unit and UI testing in iOS applications. It allows testers to write automated test cases using Swift. It is integrated with Xcode and supports functional, performance, and UI testing through XCUITest.
Also Read - Top 45 Quality Assurance Interview Questions and Answers
App Testing Interview Questions – MCQs
Now that we have covered majority of the mobile application testing interview questions, let’s go through some MCQs:
- What type of testing is performed to check how an app behaves when the internet connection is lost?
a) Load Testing
b) Interruption Testing
c) Functional Testing
d) UI Testing
Answer: b) Interruption Testing
- Which tool is commonly used for mobile automation testing?
a) Selenium
b) Appium
c) JUnit
d) TestNG
Answer: b) Appium
- What is the purpose of regression testing in mobile apps?
a) To find security issues
b) To test only new features
c) To test that existing features work after changes
d) To test performance
Answer: c) To test that existing features work after changes
- Which testing technique is used to test an app’s behavior under different network conditions?
a) Compatibility Testing
b) Performance Testing
c) Network Simulation Testing
d) Localization Testing
Answer: c) Network Simulation Testing
- What is the best way to check an app’s usability?
a) Automating UI tests
b) Asking users for feedback
c) Running performance tests
d) Conducting A/B testing
Answer: b) Asking users for feedback
Also Read - Top 25+ Java Questions for Selenium Interview
Wrapping Up
These mobile application testing interview questions and answers will help you prepare for your next job interview with confidence. Looking for mobile application testing jobs? Visit Hirist, an online job portal where you can find top IT jobs, including mobile testing roles.
