GlobalLogic Mobile App Development Interview Questions & Answers
Curated interview practice questions with answers. These are practice scenarios, not a verified list of past interview questions.
About GlobalLogic hiring for Mobile App Development roles
GlobalLogic, a Hitachi Group company, is a digital engineering services firm working on product development, embedded software, cloud and data for clients in automotive, healthcare, media and telecom. Its India engineering centres are among its largest. It hires for software engineers, test engineers, data engineers and embedded developers.
For Mobile App Development roles, this GlobalLogic practice set focuses most on Mobile Development Fundamentals (6), React Native Navigation, State and Native Modules (6), Mobile Backend, APIs and Firebase (6), Flutter State Management and Architecture (5). It has 11 easy, 19 medium questions, so you can start easy and work up to the harder ones.
Company type
IT services
Headquarters
San Jose, California, USA
Main India offices
Noida, Bengaluru, Gurugram, Hyderabad, Nagpur
GlobalLogic Mobile App Development interview process
Online assessment (aptitude + coding)
Technical round 1
Technical round 2
HR round
Typical pattern based on public candidate experiences. Rounds vary by role, team and year.
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01
How do you detect and fix memory leaks in cross-platform apps?
Leaks usually come from subscriptions, timers, controllers and listeners that are never disposed, or global caches that grow without limits. In Flutter, dispose controllers and cancel stream subscriptions in dispose, and check the DevTools memory view for growing instances. In React Native, return cleanup functions from useEffect and remove event listeners. Repeatedly open and close a screen while profiling to confirm memory returns to baseline.
Styles are JavaScript objects created with StyleSheet.create, using camelCase properties like backgroundColor. Layout uses flexbox through the Yoga engine, with flexDirection defaulting to column, unlike the web. Units are density-independent pixels without px. There is no CSS cascade, so styles are applied per component and composed with arrays. Libraries like NativeWind bring Tailwind-style classes, and themes are usually provided through context.
03
What is hot reload and how is it different from hot restart?
Hot reload injects changed code into the running app and rebuilds the UI while keeping the current state, so you see changes in about a second. Hot restart reloads the whole app code and resets state, needed when changing initialisation logic, global variables or app startup. React Native offers Fast Refresh, similar to hot reload. Native code changes, such as new plugins or platform files, require a full rebuild.
04
How do you handle gestures such as swipe to delete in React Native?
Use react-native-gesture-handler, which processes gestures on the native side, often with Reanimated for smooth animations. For swipe to delete, the Swipeable or ReanimatedSwipeable component renders action buttons behind a row. Define gestures with the Gesture API, such as Gesture.Pan, and compose them when needed. Wrap the app root in GestureHandlerRootView. Provide an accessible alternative like a long-press menu for screen reader users.
Expo Router is a file-based router built on React Navigation. Files in the app directory become routes, so app/product/[id].tsx maps to /product/42. Layout files define stacks and tabs, and every screen is deep-linkable automatically on mobile and web. It supports typed routes, protected routes for auth, and API routes. It reduces navigation boilerplate and makes URL-based linking consistent across platforms.
06
Explain the mobile app lifecycle states on Android and iOS.
Both platforms move apps between foreground active, inactive, background and terminated states. On iOS, an app goes inactive during interruptions like calls, then background, where it gets limited time before suspension. On Android, activities move through resumed, paused and stopped, and the process can be killed in background. Cross-platform apps observe these through AppLifecycleListener in Flutter or AppState in React Native to pause work and save data.
07
What local storage options exist for Flutter and React Native apps?
For simple key-value settings, Flutter uses shared_preferences and React Native uses AsyncStorage or MMKV. For sensitive data, flutter_secure_storage or expo-secure-store use Keychain and Keystore. For structured data and queries, use SQLite via sqflite or drift in Flutter and expo-sqlite or WatermelonDB in React Native. Object stores like Isar, Hive or Realm also exist, but check maintenance status before choosing.
08
What is Firebase and which services do mobile apps commonly use?
Firebase is a mobile and web development platform. Commonly used services are Authentication for email, phone OTP and social logins; Cloud Firestore and Realtime Database for synced data; Cloud Storage for files; Cloud Functions for server code; Cloud Messaging for push notifications; Crashlytics for crash reports; Analytics; Remote Config for feature flags; and App Distribution for testers. FlutterFire and React Native Firebase provide SDKs.
09
How does Flutter render UI differently from React Native?
Flutter draws every pixel itself using its own rendering engine, Impeller, onto a canvas, so widgets look identical across platforms and do not depend on native UI components. React Native maps components like View and Text to real native views, so the UI uses platform controls. Flutter gives pixel consistency and predictable performance; React Native gives native look and easier reuse of native view libraries, plus web developer familiarity with JavaScript.
10
What is the difference between ref.watch, ref.read and ref.listen in Riverpod?
ref.watch subscribes to a provider and rebuilds the widget or recomputes the provider when it changes; use it in build methods. ref.read gets the current value once without subscribing; use it in callbacks like onPressed to call notifier methods. ref.listen runs a callback when a provider changes without rebuilding, useful for side effects like showing a snackbar or navigating after a state change.
11
What is dependency injection in Flutter and how is it done?
Dependency injection supplies objects like API clients and repositories from outside instead of creating them inside widgets or blocs. In Flutter it is commonly done with Riverpod providers, Provider or RepositoryProvider in Bloc, or a service locator like get_it, sometimes with injectable for code generation. It makes code testable because tests can override dependencies with fakes, and it centralises object lifetimes.
12
How do you balance speed and quality when a client wants features fast?
I agree on what quality means for this release, such as no crashes in key flows, working offline basics and tests for payment logic. I deliver the smallest useful version first, behind feature flags if needed, and avoid shortcuts in areas that are expensive to fix later, like data models and security. I make technical debt visible in the backlog with an estimate so it is planned rather than forgotten.
Provider is simple and built on InheritedWidget but depends on BuildContext and can throw provider-not-found errors at runtime. Riverpod, from the same author, is compile-safe, independent of the widget tree, supports async providers and easy overrides for testing. Bloc uses events and states with streams, enforcing strict separation and traceability, popular in large teams and enterprises. Choose based on team familiarity and app complexity.
A Future represents a value that will be available later, like an HTTP response. Marking a function async lets it use await, which pauses that function until the Future completes without blocking the event loop. Errors are handled with try-catch. Dart runs on a single-threaded event loop per isolate, so awaiting network calls keeps the UI responsive. Use Future.wait to run independent futures concurrently.
15
Your app works on Android but crashes immediately on iOS when the user taps the camera button. What is the likely cause?
The most common cause is a missing NSCameraUsageDescription key in Info.plist. iOS terminates the app when it requests a protected resource without a usage description string. Add descriptions for camera, photo library, microphone and location as required by the plugin, written clearly for the user. Also verify the plugin's iOS setup steps, run pod install, and test on a real device since simulators lack cameras.
16
How does token-based authentication work in mobile apps?
The user signs in and the server returns a short-lived access token, often a JWT, and a longer-lived refresh token. The app stores them securely in Keychain or Keystore-backed storage and sends the access token in the Authorization header. When it expires, the app uses the refresh token to get a new one, retrying the failed request. On logout, tokens are deleted and ideally revoked on the server.
Hermes is a JavaScript engine optimised for React Native. It compiles JavaScript to bytecode at build time, so the app does not parse and compile JavaScript on startup, which reduces time to interactive, memory use and app size. It is the default engine on Android and iOS. It supports debugging with Chrome DevTools-based tools and sampling profiling to find slow JavaScript.
18
What are privacy declarations required by the app stores?
The Play Store requires a data safety form describing what data is collected, shared, encrypted and deletable, plus a privacy policy link and account deletion option for apps with accounts. The iOS App Store requires privacy nutrition labels, a privacy manifest file for the app and listed third-party SDKs describing data use and required reason APIs, and App Tracking Transparency permission before tracking users across apps.
19
How do you handle navigation in Flutter with go_router?
go_router is a declarative, URL-based routing package maintained by the Flutter team. You define GoRoute entries with paths like /product/:id, navigate with context.go or context.push, and read parameters from state.pathParameters. It supports nested navigation with ShellRoute for bottom tabs, redirects for authentication guards, and deep links on mobile and web. It wraps the Router API, which is complex to use directly.
20
What is the difference between a BaaS and a custom backend for a mobile startup?
A Backend-as-a-Service gives ready authentication, database, storage and functions, so a small team launches faster without managing servers, and costs stay low at small scale. A custom backend gives full control over business logic, data model, integrations and cost at large scale, but needs more engineering effort. Many startups begin with BaaS for the MVP and gradually move complex or expensive parts to custom services.
21
Write a React Navigation setup with a stack containing a tab navigator and a details screen.
Responsive design means layouts adapt to screen width, orientation, foldables and tablets instead of using fixed sizes. Use flexible layouts, percentages or flex, and breakpoints for compact, medium and expanded widths. In Flutter use LayoutBuilder and MediaQuery.sizeOf; in React Native use flexbox and useWindowDimensions. Respect safe areas for notches and system bars, support text scaling for accessibility, and test on small budget phones.
23
How do you handle feedback that your code is not good enough?
I treat it as information, not a personal attack. I ask for specific examples and what better looks like, fix the issues, and look for patterns so I do not repeat them. Early in my career, a reviewer pointed out that my components were too large; I learned to split them and write small hooks, and my review comments dropped steadily after that. I also thank reviewers for their time.
24
What are optimistic updates and how do you implement them?
An optimistic update changes the UI immediately as if the server request succeeded, such as liking a post, then rolls back if the request fails. It makes apps feel fast on slow networks. With TanStack Query, use onMutate to update the cache and save the previous value, onError to restore it, and onSettled to refetch. Use it for low-risk actions, not payments.
25
What is Supabase and how does it compare to Firebase?
Supabase is an open-source backend platform built on PostgreSQL, offering authentication, a relational database with auto-generated APIs, row level security, storage, edge functions and real-time subscriptions. Firebase uses NoSQL databases like Firestore. Supabase suits apps with relational data and SQL needs, and can be self-hosted, while Firebase has a richer mobile ecosystem including Crashlytics, Remote Config and FCM. Many apps combine them.
26
How do you handle pressure when a production issue affects many users?
I stay calm and focus on reducing impact first: confirm the issue, communicate status to the team, and look for the fastest safe mitigation such as a remote config switch, server-side fix or pausing a rollout. Then I find the root cause, ship a proper fix and write a short postmortem. Clear, regular updates to stakeholders reduce panic and let others plan around the issue.
27
How does the keyboard affect layouts in React Native and how do you handle it?
When the keyboard opens it can cover inputs, especially at the bottom of the screen. Use KeyboardAvoidingView with behavior padding on iOS, and rely on Android's adjustResize window setting, or use react-native-keyboard-controller for consistent behaviour on both. Wrap forms in a ScrollView with keyboardShouldPersistTaps set to handled so buttons work while the keyboard is open, and dismiss the keyboard on submit.
28
Why do Flutter apps need a state management solution beyond setState?
setState works for local UI state inside one widget, but shared state like the logged-in user, cart or settings must be read and changed by many screens. Passing it through constructors becomes messy, and rebuilding large trees hurts performance. State management libraries separate business logic from UI, make state testable, rebuild only widgets that depend on changed data, and give a clear, predictable flow of updates.
29
How do you pass parameters between screens and type them safely?
Pass small, serialisable params like IDs with navigation.navigate('Details', { id }), and read them with route.params. Define a param list type, such as type RootStackParamList = { Details: { id: string } }, and use it with the navigator and hooks for type checking. Avoid passing functions or large objects, which break state persistence and deep linking; fetch full data on the destination screen.
30
Deep links open the app but land on the home screen instead of the product page. How do you debug it?
Check that the link configuration maps the URL path to the right screen name, including nested navigators, and that path parameters match. Verify verified link setup on both platforms: assetlinks.json for Android and the associated domains entitlement plus the site association file for iOS. Test with adb shell am start and xcrun simctl openurl. Also handle links when the app is cold started versus already running.
Tips to crack the GlobalLogic Mobile App Development interview
Revise OOP, data structures and one programming language in depth, as GlobalLogic interviews focus on engineering fundamentals.
Learn about its Hitachi Group ownership and work in automotive and embedded software if you have that interest.
Prepare to discuss testing practices, including unit tests and automation, for both developer and QA roles.
Keep a one-minute story ready for every project on your CV: problem, your part, tools, result.
Practise the hard questions on this page aloud; GlobalLogic interviewers usually ask follow-ups on your first answer.
Frequently asked questions
How many rounds are there in the GlobalLogic Mobile App Development interview?
Candidates usually go through 4 stages: Online assessment (aptitude + coding); Technical round 1; Technical round 2; HR round. The exact rounds change with the role, team, location and your experience, so confirm the process with the recruiter.
Which topics should I prepare for the GlobalLogic Mobile App Development interview?
This practice set leans on Mobile Development Fundamentals (6), React Native Navigation, State and Native Modules (6), Mobile Backend, APIs and Firebase (6), Flutter State Management and Architecture (5). Revise those first, then practise explaining one or two of your own projects end to end, because most GlobalLogic interviewers ask you to walk through real work.
Are these the exact questions asked at GlobalLogic?
No. These are curated practice questions that match the skills and difficulty usually tested in it services interviews like GlobalLogic's. They are not a leaked or verified list of past questions.
Where does GlobalLogic hire Mobile App Development professionals in India?
GlobalLogic has large teams in Noida, Bengaluru, Gurugram, Hyderabad, Nagpur. Openings and locations change often, so check the GlobalLogic careers page and filter by city and experience.
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