Top 250 Mobile Development Interview Questions and Answers

The basic components of Android are activities, services, broadcast receivers, and content providers.

• Activities are the user interface components that allow users to interact with the app.

• Services are background components that perform long-running o...read more

Flutter does not have a built-in backend. Developers can use various backend technologies like Firebase, Node.js, Django, etc.

• Flutter does not provide a default backend

• Developers can choose any backend technology based on their requirements

• Popular ba...read more

React Native has a larger community and better support for native modules.

• React Native has a larger community and better support for native modules.

• React Native is more mature and stable compared to Flutter.

• React Native has better performance and fas...read more

Yes, we can differ an OS update for an iOS device using an MDM solution.

• MDM solution allows administrators to control the update process

• Administrators can choose to delay or skip updates for certain devices

• This can be done by creating update policies...read more

Activity lifecycle in Android development involves various states like onCreate, onStart, onResume, onPause, onStop, onDestroy.

• Activity is created with onCreate() method

• Activity becomes visible with onStart() and onResume() methods

• Activity goes into ...read more

Responsiveness in app can be achieved using CSS media queries and responsive design principles.

• Use CSS media queries to apply different styles based on screen sizes

• Design the app layout to be flexible and adapt to different screen sizes

• Use responsive...read more

RecyclerView is a flexible view for providing a limited window into a large data set.

• RecyclerView recycles views to improve performance and memory usage.

• It uses a LayoutManager to organize and position items within the view.

• Adapter provides data to b...read more

Push Notification is a message that pops up on a mobile device. It is used to notify users about new content or events.

• Push notifications are used to keep users engaged with an app.

• They can be used to inform users about new content, updates, or event...read more

Ionic Framework is an open-source UI toolkit for building high-quality, cross-platform mobile and web apps using web technologies.

• It is built on top of Angular and Apache Cordova

• It provides pre-built UI components and tools for building mobile apps

• It...read more

Skills needed to develop an Android application

• Proficiency in Java or Kotlin programming languages

• Familiarity with Android Studio IDE

• Knowledge of Android SDK and APIs

• Understanding of UI/UX design principles

• Ability to work with databases and web servi...read more

App life cycle refers to the stages an application goes through from installation to removal.

• App is installed on a device

• App is launched and runs

• App goes into background when not in use

• App may be terminated by the user or system

• App data may be cleare...read more

LaunchEffect is a function in Jetpack Compose that allows you to trigger side effects when a composable is first launched.

• LaunchEffect is used to perform actions such as fetching data from a network or initializing a resource when a composable is fir...read more

Laravel is a PHP framework commonly used for backend development in mobile applications.

• Laravel provides a robust backend infrastructure for mobile apps.

• It offers features like routing, database management, and authentication.

• Laravel's RESTful API de...read more

Android application development concepts include activities, intents, layouts, fragments, services, and content providers.

• Activities: Represent the UI and handle user interactions.

• Intents: Enable communication between components.

• Layouts: Define the s...read more

Yes, React Native Context API is a way to manage global state in React Native applications.

• Context API allows passing data through the component tree without having to pass props down manually at every level.

• It is useful for managing global state suc...read more

To upload the app to both stores, create separate builds for each platform and follow the submission guidelines of each store.

• Create separate builds for iOS and Android platforms

• Follow the submission guidelines of the App Store and Google Play Store

• S...read more

Xamarin Profiler is a tool for analyzing and optimizing the performance of Xamarin apps.

• Xamarin Profiler helps identify memory leaks, CPU usage, and other performance issues

• It can be used with both iOS and Android apps

• The tool provides detailed repor...read more

ANR can be handled by optimizing code, using background threads, and avoiding long-running operations on the main thread.

• Optimize code to reduce processing time

• Use background threads for long-running operations

• Avoid performing network operations on t...read more

Native apps are built for specific platforms while hybrid apps are built using web technologies and can run on multiple platforms.

• Native apps are built using platform-specific programming languages like Swift for iOS and Java for Android.

• Hybrid apps ...read more

Hybrid apps are developed using web technologies and can run on multiple platforms, while native apps are specifically built for a single platform using its native language.

• Hybrid apps are developed using web technologies like HTML, CSS, and JavaScri...read more

Yes, shared preferences do not encrypt data by default.

• Shared preferences store data in XML format in plain text

• If encryption is needed, developers should implement their own encryption methods

• Sensitive data should not be stored in shared preferences...read more

Xamarin Profiler is a tool for analyzing and optimizing the performance of Xamarin apps.

• Xamarin Profiler helps identify performance bottlenecks in the app code.

• It provides detailed information on memory usage, CPU usage, and network activity.

• Develope...read more

IntentService is a subclass of Service that can handle asynchronous requests on the main thread.

• IntentService is used for handling long-running operations in the background without blocking the main thread.

• It is started with an Intent and runs in a s...read more

Implement multiple RecyclerViews on a magnified screen in an Android app by adjusting item sizes and spacing.

• Adjust item sizes and spacing based on screen magnification level

• Use nested RecyclerViews or custom layouts to display multiple lists

• Implemen...read more

Yes, I have implemented Android SDK in multiple projects.

• I have used Android SDK to develop various features like push notifications, location services, and in-app purchases.

• I have also integrated third-party SDKs like Facebook and Google Maps SDKs i...read more

Xamarin.Forms is a UI toolkit that allows developers to create cross-platform mobile apps using a single codebase.

• Xamarin.Forms allows developers to write code once and deploy it across multiple platforms, such as iOS, Android, and Windows.

• It provide...read more

A push notification is a message that pops up on a mobile device to alert the user about new updates or information.

• Push notifications are commonly used by apps to engage users and provide timely information.

• They can include text, images, and links t...read more