Technology and Engineering · #6 in series
Mobile Developer (iOSAndroid) interview prep
Top 100 interview questions for Mobile Developer (iOSAndroid) — modeled on real FAANG loops.
100
Questions
18
Topics
20
Free
General Programming
5 questions1
Explain the concept of object-oriented programming and its principles.
mediumconcept
2
What are design patterns? Can you name a few and describe their use cases?
easysystem
3
How do you manage memory in your code? Discuss garbage collection vs. manual memory management.
mediumcoding
4
Explain the difference between synchronous and asynchronous programming.
mediumconcept
5
What is multithreading, and how is it used in mobile applications?
mediumconcept
iOS Development
10 questions6
Explain the iOS app lifecycle.
mediumconcept
7
What is the difference between a strong, weak, and unowned reference in Swift?
mediumconcept
8
Describe the Model-View-Controller (MVC) architecture pattern in iOS.
easysystem
9
How do you handle asynchronous operations in Swift?
mediumbehavioral
10
Explain the use of Grand Central Dispatch (GCD) in iOS.
mediumconcept
11
What is Auto Layout, and how does it work?
mediumconcept
12
Describe how push notifications are implemented in iOS.
easycoding
13
How does Core Data work, and when would you use it?
mediumconcept
14
Explain the difference between frame and bounds in UIKit.
mediumconcept
15
What are the differences between Swift and Objective-C?
mediumconcept
Android Development
10 questions16
Explain the Android app lifecycle.
mediumconcept
17
How do you manage Android app resources?
mediumconcept
18
What is an Intent in Android, and how is it used?
mediumconcept
19
Describe the differences between an Activity and a Fragment.
easyconcept
20
How does the RecyclerView differ from ListView?
mediumconcept
21
Explain how data binding works in Android.
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22
What are the different types of Services in Android?
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23
How do you handle background tasks in Android?
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24
Describe the architecture components in Android Jetpack.
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25
What is the difference between a Handler and a Runnable in Android?
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Cross-Platform Development
5 questions26
What are the pros and cons of using cross-platform tools like Flutter and React Native?
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27
How does Flutter achieve a native look and feel on both iOS and Android?
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28
Explain how state management is handled in React Native.
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29
What is the difference between a StatefulWidget and a StatelessWidget in Flutter?
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30
How do you integrate native modules in React Native?
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User Interface/Experience
5 questions31
How do you ensure your mobile app provides a good user experience?
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32
Explain how you manage different screen sizes and resolutions.
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33
What are custom views, and when would you create them?
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34
How do you test the user interface of your mobile applications?
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35
Discuss the importance of accessibility in mobile apps.
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Networking and Data
5 questionsPerformance Optimization
5 questions41
How do you identify and fix performance bottlenecks in mobile apps?
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42
Discuss the impact of memory leaks and how to prevent them.
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43
What tools do you use for profiling your mobile applications?
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44
Explain lazy loading and its benefits in mobile development.
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45
How do you optimize battery usage in mobile apps?
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Security
5 questions46
What are some common security concerns in mobile app development?
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47
How do you implement data encryption on mobile devices?
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48
Explain how you manage user authentication in mobile apps.
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49
Describe how you handle sensitive user information.
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50
What measures do you take to prevent reverse engineering of your app?
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Version Control and Collaboration
5 questionsProblem Solving and Algorithms
5 questions56
How do you approach solving complex problems in your code?
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57
Can you discuss a time when you had to optimize an algorithm?
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58
Explain the concept of Big O notation.
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59
How do you handle debugging in your projects?
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60
Describe a challenging technical problem you've encountered and how you resolved it.
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Behavioral and Situational
5 questions61
Describe a time when you had to work under a tight deadline.
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62
How do you handle conflicts in a team setting?
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63
Discuss a situation where you received critical feedback. How did you respond?
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64
Describe a project you are particularly proud of and your role in it.
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65
How do you prioritize tasks when working on a project?
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Testing and Quality Assurance
5 questionsDeployment and Maintenance
5 questions71
How do you manage app releases on the App Store and Google Play?
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72
What is the process for submitting an iOS app to the App Store?
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73
How do you handle app updates and backward compatibility?
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74
Explain how you monitor app performance in production.
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75
What strategies do you use for maintaining legacy code?
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Emerging Technologies and Trends
5 questions76
What are your thoughts on the future of mobile development?
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77
How do you stay updated with the latest trends in mobile technology?
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78
Discuss a new technology or tool you've recently learned.
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79
How do you evaluate whether to adopt a new technology in your projects?
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80
What impact do you think artificial intelligence will have on mobile development?
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Project Management and Workflow
5 questionsPersonal Experience and Insights
5 questionsEthics and Professionalism
5 questionsMiscellaneous
5 questions96
What is the difference between a static library and a dynamic library?
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97
How do you implement internationalization in mobile apps?
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98
Discuss the significance of user feedback in app development.
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99
How do you handle app analytics and user data?
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100
What role does documentation play in your development process?
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