Sensight Technologies Software Engineer Interview Questions and Answers

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 events.

• Push notifications can be personalized based on user preferences.

• They can be sent even when the app is not open.

• Examples include news alerts, social media notifications, ...read more

Firebase is a mobile and web application development platform that provides real-time database, authentication, and hosting services.

• Firebase provides a real-time database to store and sync data between clients

• Firebase Authentication allows users to sign in to your app using different authentication methods

• Firebase Cloud Messaging enables sending push notifications to users

• Firebase Hosting provides a fast and secure wa...read more

ARC is an automatic memory management system used in iOS applications.

• ARC stands for Automatic Reference Counting.

• It automatically manages the memory of objects in an iOS application.

• It keeps track of the number of references to an object and deallocates it when there are no more references.

• ARC is the default memory management system in iOS applications since iOS 5.

• ARC reduces the risk of memory leaks and crashes cause...read more

Application life cycle includes planning, development, testing, deployment, and maintenance.

• Planning phase involves gathering requirements and creating a project plan.

• Development phase involves coding and building the application.

• Testing phase involves identifying and fixing bugs.

• Deployment phase involves releasing the application to users.

• Maintenance phase involves updating and maintaining the application.

• Iterative pr...read more

Design patterns are important in Android and iOS app development for efficient and scalable code.

• MVC (Model-View-Controller) pattern is commonly used in both Android and iOS development.

• Android also uses MVP (Model-View-Presenter) and MVVM (Model-View-ViewModel) patterns.

• iOS uses the Delegate pattern for communication between objects and the Singleton pattern for creating a single instance of an object.

• Other patterns u...read more

Android and iOS applications have different architectures.

• Android follows a layered architecture with four main components: activities, services, broadcast receivers, and content providers.

• iOS follows a Model-View-Controller (MVC) architecture with three main components: models, views, and controllers.

• Both architectures have their own unique features and advantages.

• Android's architecture allows for more flexibility and...read more

SharedPreference is a key-value pair storage mechanism in Android.

• Used to store small amounts of data

• Data is stored in XML format

• Can be accessed from any activity or fragment within the app

• Can be used to store user preferences, login credentials, etc.

UserDefault is used to store small amounts of data in key-value pairs in iOS applications.

• Import UserDefault in your class

• Set a value for a key using set(_:forKey:)

• Retrieve a value for a key using object(forKey:)

• Remove a value for a key using removeObject(forKey:)

Bluetooth Low Energy can be integrated with Android and iOS apps using Bluetooth APIs and libraries.

• Use BluetoothGatt API for Android and CoreBluetooth framework for iOS

• Implement BluetoothGattCallback for Android and CBCentralManagerDelegate for iOS

• Use UUIDs to identify services and characteristics

• Handle Bluetooth permissions and enable Bluetooth on devices

• Test the integration with Bluetooth Low Energy devices