Job Description: As an iOS Engineer you will be responsible for developing applications ('apps') for Apple devices (iOS) and get them into the Apps Store. You will work as part of a team to define, design and implement features in the application. You will identify and correct deficiencies and fix errors in codes that show as bugs.
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1. Can you explain the difference between unit testing and UI testing in iOS development?
2. What is XCTest, and how do you use it for testing iOS applications?
3. Describe the process of setting up UI automation testing for an iOS app.
4. How do you handle asynchronous tasks in UI testing?
5. What is XCUITest, and how does it differ from XCTest?
6. Can you explain how to mock network requests in iOS UI testing?
7. What is the purpose of the XCUIElement class in iOS UI testing?
8. How do you identify elements on the screen in XCTest UI tests?
9. Explain the concept of accessibility testing in iOS development.
10. What are some common challenges you've faced when writing UI tests for iOS apps?
11. How do you handle dynamic content in UI testing?
12. Describe the role of code coverage in iOS UI testing.
13. What are some strategies for writing maintainable UI tests in iOS development?
14. How do you handle localization testing for iOS apps?
15. Can you explain the concept of page objects in iOS UI testing?
16. Describe your experience with continuous integration and iOS UI testing.
17. How do you handle testing on different iOS devices and screen sizes?
18. What are some best practices for structuring UI test code in iOS apps?
19. Can you explain how to use XCTestExpectation for asynchronous testing?
20. Describe your experience with testing accessibility features in iOS apps.
21. How do you handle testing for different iOS versions?
22. Can you explain how to test push notifications in iOS apps?
23. Describe your approach to handling flakiness in UI tests.
24. What are some tools and libraries you've used for iOS UI testing?
25. How do you handle testing for different languages and locales in iOS apps?
26. What are some common pitfalls to avoid when writing UI tests for iOS apps?
27. Describe a challenging bug you encountered during UI testing and how you resolved it.
28. How do you ensure that your UI tests are reliable and deterministic?
29. Can you explain the role of snapshot testing in iOS development?
30. Describe your experience with performance testing for iOS apps.
31. How do you handle testing for different network conditions in iOS apps?
32. Can you explain the concept of UI automation frameworks in iOS development?
33. Describe your experience with testing user authentication and authorization flows in iOS apps.
34. How do you handle testing for different device orientations in iOS apps?
35. What are some strategies for reducing test execution time in iOS UI testing?
36. Can you explain the difference between UI testing and end-to-end testing in iOS development?
37. Describe your experience with testing for memory leaks and performance bottlenecks in iOS apps.
38. How do you handle testing for user interactions such as swipes and gestures in iOS apps?
39. What are some strategies for testing error handling and recovery in iOS apps?
40. Describe your experience with testing for accessibility compliance in iOS apps.
41. How do you handle testing for different screen resolutions in iOS apps?
42. Can you explain the concept of A/B testing in the context of iOS app development?
43. Describe your experience with testing for app launch performance in iOS apps.
44. How do you handle testing for offline functionality in iOS apps?
45. Can you explain how to use XCTestAssertions for verifying expected behaviors in iOS UI tests?
46. Describe your experience with testing for internationalization and localization in iOS apps.
47. How do you handle testing for deep linking and universal links in iOS apps?
48. What are some strategies for testing for edge cases and boundary conditions in iOS apps?
49. Can you explain how to use XCTestSuite to organize and manage UI test cases in iOS apps?
50. Describe your experience with testing for security vulnerabilities in iOS apps.
51. How do you handle testing for app backgrounding and foregrounding in iOS apps?
52. Can you explain the process of testing app updates and migrations in iOS apps?
53. Describe your approach to handling flaky UI tests that intermittently fail.
54. How do you integrate iOS UI tests with continuous delivery pipelines?
55. What strategies do you use to test app stability under high traffic or heavy usage?
56. Can you explain how to simulate user interactions with hardware features like Face ID or Touch ID?
57. Describe your experience with testing in-app purchases in iOS apps.
58. How do you ensure that your UI tests cover both dark and light modes in iOS apps?
59. What tools or libraries have you used for mocking GPS and location services in iOS UI tests?
60. How do you handle testing apps that rely on third-party services or APIs?
61. Can you explain how to test for interruptions like phone calls or notifications in iOS apps?
62. What are some strategies for testing app behavior when permissions (e.g., camera or location) are denied?
63. How do you approach testing push notification handling when the app is in the background or terminated?
64. Can you describe how to test app onboarding flows and tutorials?
65. How do you ensure your tests cover edge cases for different internet speeds or offline scenarios?
66. What are the differences between black-box and white-box testing, and how do they apply to UI testing?
67. Can you explain how to test dynamic type and font scaling in iOS apps?
68. How do you handle testing apps that have a lot of custom gestures and animations?
69. Describe your experience with testing apps that need access to device-specific features (e.g., accelerometer, gyroscope).
70. How do you test iOS apps that integrate with Apple Watch or other external accessories?
71. Can you explain the importance of clean up in UI tests and how to implement it?
72. What are some ways to reduce flaky test results caused by animations or transitions in iOS apps?
73. How do you handle cross-platform testing when the iOS app has an Android version?
74. What are some strategies for testing apps that implement complex navigation flows (e.g., tab bars, modals)?
75. Can you explain the role of test fixtures in XCTest?
76. Describe your approach to testing deep hierarchies of UI elements in an iOS app.
77. How do you test background tasks like data synchronization or scheduled notifications?
78. Can you explain how to test apps that utilize Apple's Core Data or other local databases?
79. How do you handle the testing of external libraries or SDKs that are integrated into your iOS app?
80. What methods do you use to simulate network conditions like latency or packet loss in iOS apps?
81. Describe your approach to testing large, monolithic view controllers or scenes.
82. How do you handle testing apps that feature adaptive layouts (e.g., Auto Layout, Size Classes)?
83. Can you explain how you use XCTestCase subclasses to create reusable test patterns?
84. How do you test for visual bugs that could occur due to image assets being misaligned or incorrectly sized?
85. Describe your experience with running UI tests on physical devices versus simulators.
86. What strategies do you use to test apps with multi-step user flows (e.g., checkout, form submission)?
87. How do you handle testing for edge cases where users may have older versions of iOS installed?
88. Can you explain how you use XCTestActivity to log additional information during UI tests?
89. How do you test apps that rely on sensitive data, like user authentication or encryption?
90. Describe your experience with testing iOS widgets and their interaction with the main app.
91. How do you handle testing for apps that support dynamic app icons or app clips?
92. Can you explain how you test apps that interact with third-party authentication providers like Google or Facebook?
93. What strategies do you use for testing apps that contain time-sensitive content, like countdowns or live data?
94. How do you handle testing apps that require a large set of test data (e.g., database entries, user profiles)?
95. Can you explain how to test apps that integrate with HomeKit or HealthKit frameworks?
96. How do you ensure your tests are optimized to handle memory leaks during execution?
97. Describe your experience with testing media-heavy apps (e.g., video, audio playback, or streaming).
98. How do you test apps that interact with external hardware through Bluetooth or other protocols?
99. Can you explain how you handle tests for apps that need to function across multiple time zones?
100. How do you ensure the app is still usable after an unexpected error or crash during testing?
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