| 1 | How do you properly set up Flutter's global error handling using FlutterError.onError and PlatformDispatcher.instance.onError to automatically capture every uncaught error and forward it to a crash reporting service? Flutter › Error Handling & Crash Reporting (Sentry & Crashlytics) | Flutter | Error Handling & Crash Reporting (Sentry & Crashlytics) | Intermediate |
| 2 | Why is it valuable to log non fatal, caught errors to a crash reporting service, in addition to only tracking genuine fatal crashes that actually cause the app to fully close? Flutter › Error Handling & Crash Reporting (Sentry & Crashlytics) | Flutter | Error Handling & Crash Reporting (Sentry & Crashlytics) | Intermediate |
| 3 | Why is proper error handling important in a Flutter app, and what happens by default if an unhandled exception occurs somewhere within a running app? Flutter › Error Handling & Crash Reporting (Sentry & Crashlytics) | Flutter | Error Handling & Crash Reporting (Sentry & Crashlytics) | Beginner |
| 4 | What is Sentry, and how does it compare to Firebase Crashlytics in terms of the additional contextual information and features it provides for diagnosing an error? Flutter › Error Handling & Crash Reporting (Sentry & Crashlytics) | Flutter | Error Handling & Crash Reporting (Sentry & Crashlytics) | Intermediate |
| 5 | How should a team establish an alerting and triage process around crash reporting data, ensuring that a sudden meaningful spike in a specific crash's frequency is actually noticed and addressed quickly after a new release? Flutter › Error Handling & Crash Reporting (Sentry & Crashlytics) | Flutter | Error Handling & Crash Reporting (Sentry & Crashlytics) | Advanced |
| 6 | What is Firebase Crashlytics, and how does it automatically capture and report crashes that occur in your app once it is actually running on real users' devices? Flutter › Error Handling & Crash Reporting (Sentry & Crashlytics) | Flutter | Error Handling & Crash Reporting (Sentry & Crashlytics) | Beginner |
| 7 | How can custom keys, breadcrumbs, and user context attached to a crash report help a development team dramatically speed up diagnosing and reproducing a genuinely difficult, hard to reproduce production issue? Flutter › Error Handling & Crash Reporting (Sentry & Crashlytics) | Flutter | Error Handling & Crash Reporting (Sentry & Crashlytics) | Advanced |
| 8 | How do you properly request and handle runtime camera and photo library permissions in a Flutter app, and what happens if a user denies that permission? Flutter › Camera & Media Handling in Flutter | Flutter | Camera & Media Handling in Flutter | Intermediate |
| 9 | How do you properly handle errors that occur during an asynchronous operation using a try catch block combined with async and await? Flutter › Dart Asynchronous Programming (Future & async/await) | Flutter | Dart Asynchronous Programming (Future & async/await) | Intermediate |
| 10 | How should a form properly and clearly handle and display a genuine server side validation error, such as discovering that a specific chosen username is already actually taken, that genuinely cannot actually be determined purely through simple client side validation logic alone? Flutter › Forms & Input Validation in Flutter | Flutter | Forms & Input Validation in Flutter | Intermediate |
| 11 | How should you properly handle a genuinely nullable or optional field within your JSON deserialization logic, ensuring your app genuinely does not crash if a specific expected field happens to actually be missing from a given received response? Flutter › JSON Serialization & Deserialization | Flutter | JSON Serialization & Deserialization | Intermediate |
| 12 | How do Dio interceptors let you centrally add a shared authentication header to every single outgoing request, or centrally handle a genuine expired token error consistently across your entire app? Flutter › Networking with HTTP & Dio | Flutter | Networking with HTTP & Dio | Intermediate |
| 13 | How should you properly handle a genuine network timeout and other common network errors, such as no internet connectivity, when making a request using either the http or Dio packages? Flutter › Networking with HTTP & Dio | Flutter | Networking with HTTP & Dio | Intermediate |
| 14 | How should you properly and correctly handle an error that genuinely occurs on the native side of a platform channel, and how does that particular error actually get properly reported back to your own Dart code? Flutter › Platform Channels (Native Android & iOS Integration) | Flutter | Platform Channels (Native Android & iOS Integration) | Intermediate |
| 15 | How do you properly implement database migrations in sqflite, correctly handling a schema change such as adding a genuinely new column when a user actually updates to a newer version of your app? Flutter › SQLite & Local Databases (sqflite) | Flutter | SQLite & Local Databases (sqflite) | Intermediate |
| 16 | How can improper use of unawaited Futures introduce subtle bugs, such as a race condition or an unhandled error, into a Flutter application, and how does the unawaited function help make this deliberate choice explicit? Flutter › Dart Asynchronous Programming (Future & async/await) | Flutter | Dart Asynchronous Programming (Future & async/await) | Advanced |
| 17 | How should you properly design your app's own networking layer to genuinely support parallel loading of several genuinely independent pieces of data needed for a single given screen, while still properly and gracefully handling the case where just one of those particular requests genuinely happens to fail? Flutter › REST API Integration in Flutter | Flutter | REST API Integration in Flutter | Advanced |
| 18 | How do the async and await keywords let you write asynchronous code in Dart that reads and looks like simple, straightforward sequential code? Flutter › Dart Asynchronous Programming (Future & async/await) | Flutter | Dart Asynchronous Programming (Future & async/await) | Beginner |
| 19 | What is a MethodChannel, and how does it let you actually invoke a specific native method from your Dart code and properly receive back its own returned result? Flutter › Platform Channels (Native Android & iOS Integration) | Flutter | Platform Channels (Native Android & iOS Integration) | Beginner |
| 20 | How do you properly request notification permission from a user, and what genuinely differs between how Android and iOS each respectively handle this specific particular permission request? Flutter › Push Notifications in Flutter (FCM) | Flutter | Push Notifications in Flutter (FCM) | Beginner |
| 21 | What are matchers in Flutter testing, such as equals, isTrue, and throwsA, and how do they let you express several genuinely different kinds of specific assertions within a given test? Flutter › Unit Testing in Flutter | Flutter | Unit Testing in Flutter | Beginner |
| 22 | What is the difference between the Google Play Store's internal testing, closed testing, and production release tracks, and why would a team use them in that specific order? Flutter › App Deployment (Play Store & App Store) | Flutter | App Deployment (Play Store & App Store) | Intermediate |
| 23 | How does Firestore's offline persistence feature let a Flutter app continue functioning, including reading previously cached data and queuing writes, even when the device temporarily has no internet connection? Flutter › Cloud Firestore & Firebase Storage | Flutter | Cloud Firestore & Firebase Storage | Intermediate |
| 24 | What is the null assertion operator, written as an exclamation mark, and why should it generally be used carefully and only when you are genuinely certain a specific nullable value cannot actually be null at that particular point? Flutter › Dart Null Safety | Flutter | Dart Null Safety | Intermediate |
| 25 | How does Dart's late keyword let you declare a non nullable variable that will genuinely be initialized before it is ever actually first used, even though it cannot be given an initial value immediately at the exact point of its declaration? Flutter › Dart Null Safety | Flutter | Dart Null Safety | Intermediate |
| 26 | How should a background task properly handle a failure, such as a network request genuinely failing partway through, and what retry behavior does workmanager actually provide out of the box for this kind of situation? Flutter › Flutter Background Tasks & WorkManager | Flutter | Flutter Background Tasks & WorkManager | Intermediate |
| 27 | How can you use the debugger and breakpoints within an IDE like Visual Studio Code or Android Studio to actually step through your Flutter app's code line by line and inspect the exact current values of your variables? Flutter › Flutter DevTools & Debugging | Flutter | Flutter DevTools & Debugging | Intermediate |
| 28 | What is a GraphQL mutation, and how does it genuinely differ from a regular query specifically in terms of properly performing an action that actually genuinely changes data on the server? Flutter › GraphQL in Flutter | Flutter | GraphQL in Flutter | Intermediate |
| 29 | How should you properly listen to and correctly handle the ongoing purchase update stream provided by the in_app_purchase package, properly reacting appropriately to a pending, completed, or genuinely failed purchase status? Flutter › In App Purchases in Flutter | Flutter | In App Purchases in Flutter | Intermediate |
| 30 | How should an app properly handle restoring a user's own previously already made purchases, such as when they genuinely reinstall the app or properly switch over to using an entirely different new device? Flutter › In App Purchases in Flutter | Flutter | In App Purchases in Flutter | Intermediate |
| 31 | How should you properly and correctly handle requesting location permissions across the several genuinely different possible permission states, including denied, granted, and permanently denied, using the geolocator or permission_handler packages? Flutter › Maps & Geolocation in Flutter | Flutter | Maps & Geolocation in Flutter | Intermediate |
| 32 | How should you properly and correctly avoid calling setState after a StatefulWidget's own associated State object has genuinely already been disposed of, such as after an asynchronous operation genuinely completes following a user having already navigated away? Flutter › State Management with setState | Flutter | State Management with setState | Intermediate |
| 33 | How should you properly implement automatic reconnection logic for a WebSocket connection that genuinely gets unexpectedly dropped, such as when a device briefly loses its internet connectivity or moves between different networks? Flutter › WebSockets & Real Time Data in Flutter | Flutter | WebSockets & Real Time Data in Flutter | Intermediate |
| 34 | What is a phased or staged rollout, and how does gradually releasing an app update to an increasing percentage of the total user base help reduce the risk of a bad release affecting everyone at once? Flutter › App Deployment (Play Store & App Store) | Flutter | App Deployment (Play Store & App Store) | Advanced |
| 35 | How can a CI/CD pipeline automate the entire release process for a Flutter app, including automatically bumping the version number and generating meaningful release notes based on recent commits? Flutter › CI/CD Pipelines for Flutter Apps | Flutter | CI/CD Pipelines for Flutter Apps | Advanced |
| 36 | How do iOS's specific background execution restrictions, particularly around limited genuine background task execution time, differ meaningfully from Android's own generally more permissive background task model? Flutter › Flutter Background Tasks & WorkManager | Flutter | Flutter Background Tasks & WorkManager | Advanced |
| 37 | How can you use Flutter DevTools' dedicated network view together with proper logging to effectively debug a genuinely complex issue involving several separate related API calls happening across your application? Flutter › Flutter DevTools & Debugging | Flutter | Flutter DevTools & Debugging | Advanced |
| 38 | How can you properly and safely use a BuildContext across an asynchronous gap, such as directly after an await statement, without genuinely risking using a context that has since actually genuinely become invalid because its own underlying widget was already disposed of in the meantime? Flutter › Flutter Widget Tree, Element Tree & BuildContext | Flutter | Flutter Widget Tree, Element Tree & BuildContext | Advanced |
| 39 | How should you properly handle schema migration in Hive when you genuinely need to add, remove, or meaningfully change a specific field on an already existing HiveObject class after your app has genuinely already been released to real actual users? Flutter › Hive & NoSQL Local Storage | Flutter | Hive & NoSQL Local Storage | Advanced |
| 40 | How can you properly and safely migrate existing data already stored using SharedPreferences over to a genuinely more full featured local database such as Hive, once an app's own particular storage needs have genuinely grown beyond what simple key value storage alone can reasonably handle? Flutter › Local Data Storage with SharedPreferences | Flutter | Local Data Storage with SharedPreferences | Advanced |
| 41 | How can you properly implement an effective retry strategy with exponential backoff for a genuinely failed network request, meaningfully improving your app's own overall resilience against genuinely temporary, transient network issues? Flutter › Networking with HTTP & Dio | Flutter | Networking with HTTP & Dio | Advanced |
| 42 | How should you properly implement request and response logging for debugging purposes, while genuinely and carefully ensuring genuinely sensitive data, such as an authentication token or a password, is never actually accidentally logged in plain readable text? Flutter › Networking with HTTP & Dio | Flutter | Networking with HTTP & Dio | Advanced |
| 43 | How should you properly implement database transactions in sqflite to ensure several genuinely related separate operations either all fully succeed together, or all genuinely fail together entirely, maintaining your overall data's own genuine consistency? Flutter › SQLite & Local Databases (sqflite) | Flutter | SQLite & Local Databases (sqflite) | Advanced |
| 44 | How do you properly implement optimistic updates using Riverpod, immediately updating your interface before an actual backend confirmation genuinely arrives, then properly rolling back that particular change if the request genuinely happens to fail? Flutter › State Management with Riverpod | Flutter | State Management with Riverpod | Advanced |
| 45 | How should you properly design a message queuing and delivery confirmation system, ensuring a message genuinely sent while a WebSocket connection was temporarily disconnected is properly and reliably delivered once that particular connection actually genuinely reconnects? Flutter › WebSockets & Real Time Data in Flutter | Flutter | WebSockets & Real Time Data in Flutter | Advanced |