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I applied via Referral and was interviewed before Apr 2023. There was 1 interview round.
The app life cycle in iOS refers to the sequence of events that occur from the time an app is launched to when it is terminated.
The app is launched by the user or system.
The app enters the foreground and becomes active.
The app can enter the background when the user switches to another app or the device locks.
The app can be terminated by the user or system.
The app can also be suspended, where it remains in memory but do...
Classes are reference types, while structs are value types in Swift.
Classes are reference types, meaning they are passed by reference. Changes made to one instance will affect all references to that instance.
Structs are value types, meaning they are passed by value. Each instance has its own copy, so changes made to one instance do not affect others.
Classes support inheritance, while structs do not.
Classes have deiniti...
Protocol is a set of methods and properties that a class, struct, or enum can implement to define a particular functionality.
Protocols define a blueprint of methods, properties, and other requirements that a class or struct must adhere to.
They are similar to interfaces in other programming languages.
Classes, structs, and enums can adopt protocols by conforming to them.
Protocols allow for polymorphism and code reuse in ...
Types of access controls in iOS include public, internal, private, and fileprivate.
Public: Accessible from anywhere, both within the module and outside.
Internal: Accessible from anywhere within the module.
Private: Accessible only within the defining type.
Fileprivate: Accessible only within the same file.
A closure is a self-contained block of code that can be passed around and used in your code.
Closures capture and store references to any constants and variables from the context in which they are defined.
Closures are similar to blocks in Objective-C and lambdas in other programming languages.
Closures can be used to pass functions as arguments to other functions.
Example: { (parameters) -> return type in code }
Generics allow you to write flexible, reusable functions and data types that can work with any type.
Generics enable you to write functions and data types that can work with any type.
They help in writing flexible and reusable code.
Example: Array
APNs life cycle refers to the process of sending push notifications to iOS devices.
APNs connects with the device through a persistent and secure connection.
The device registers with APNs to receive push notifications.
When a push notification is sent, APNs delivers it to the device.
If the device is offline, APNs stores the notification and delivers it when the device is back online.
Intent is a messaging object used to request an action from another app component. There are two types of intents: explicit and implicit.
Intent is used to start an activity, service, or broadcast receiver.
Explicit intent specifies the component to be invoked by its name.
Implicit intent specifies the action to be performed and optionally, the data to be used.
Examples of implicit intents are opening a webpage or making a...
Activity and Fragment life cycles are a series of states that an Android component goes through during its lifetime.
Activity life cycle includes onCreate(), onStart(), onResume(), onPause(), onStop(), and onDestroy() methods.
Fragment life cycle includes onAttach(), onCreate(), onCreateView(), onActivityCreated(), onStart(), onResume(), onPause(), onStop(), onDestroyView(), and onDetach() methods.
Both life cycles are im...
Activity is a single screen with a user interface, while fragments are a portion of the user interface in an activity.
Activity is a standalone component that can be launched by an application.
Fragments are reusable components that can be used in multiple activities.
An activity can contain multiple fragments.
Fragments have their own lifecycle and can be added or removed dynamically.
Example: A music player app can have a...
ArrayList is a resizable array while HashMap is a key-value pair collection.
ArrayList is ordered while HashMap is unordered
ArrayList allows duplicate values while HashMap does not
HashMap provides faster access to elements using keys
Use ArrayList when you need to maintain the order of elements
Use HashMap when you need to access elements using keys
Firebase Notification is a cloud messaging service provided by Google.
Firebase Notification allows developers to send messages and notifications to their app users.
It supports both Android and iOS platforms.
It provides a console to send notifications to specific devices or topics.
It also supports sending notifications based on user behavior and location.
Firebase Notification can be integrated with other Firebase servic
I applied via LinkedIn and was interviewed in Aug 2021. There were 2 interview rounds.
Java is a high-level, object-oriented programming language used for developing desktop, web, and mobile applications.
Java is platform-independent and can run on any operating system.
It is statically typed, meaning that variables must be declared before use.
Java is used for developing Android applications, enterprise applications, and web applications.
It is known for its security features, such as the Java Security Mana...
Oops concept in java
Object-oriented programming paradigm
Encapsulation, Inheritance, Polymorphism, Abstraction
Classes and Objects
Access Modifiers
Interfaces and Abstract Classes
SDK stands for Software Development Kit. It is a set of tools and resources used for developing applications for a specific platform.
SDK provides developers with APIs, libraries, and documentation to build applications for a specific platform.
Android SDK includes tools like Android Studio, ADB, and Emulator.
SDK helps developers to test, debug, and optimize their applications.
SDK also provides sample code and templates
Retrofit and Volley are popular networking libraries for Android development.
Retrofit is a type-safe HTTP client for Android and Java.
Volley is a fast and efficient networking library for Android.
Retrofit uses annotations to define API endpoints and request parameters.
Volley provides easy-to-use APIs for making network requests and handling responses.
Retrofit is best suited for RESTful APIs, while Volley is more versat...
Modules are independent units of code that can be used to build larger software systems.
Modules can be reused in different projects
They can be developed and tested independently
Modules can be combined to form a larger system
Examples include libraries, plugins, and frameworks
Signed APK is a single file that is signed and ready for distribution, while bundle is a publishing format that includes multiple APKs optimized for different device configurations.
Signed APK is generated from a single APK file, while bundle generates multiple APKs.
Signed APK is signed with a private key, while bundle is signed with an upload key.
Bundle includes multiple APKs optimized for different device configuratio...
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I applied via Job Portal and was interviewed in Feb 2024. There was 1 interview round.
I applied via Naukri.com and was interviewed in Dec 2021. There were 4 interview rounds.
MVVM is a design pattern that separates the UI logic from the business logic.
MVVM stands for Model-View-ViewModel
Model represents the data and business logic
View represents the UI
ViewModel acts as a mediator between the View and Model
ViewModel exposes data and commands to the View
MVVM helps in unit testing and maintainability
I applied via Naukri.com and was interviewed in Jan 2022. There was 1 interview round.
I applied via Naukri.com and was interviewed before Apr 2023. There were 2 interview rounds.
Both Kotlin and Java can be used for coding in Android development.
Both Kotlin and Java are officially supported languages for Android development.
Kotlin is preferred by many developers for its concise syntax and reduced boilerplate code.
Java is still widely used in existing Android projects and has a larger pool of resources and libraries.
Developers can choose between Kotlin and Java based on their familiarity and pro
I applied via Approached by Company and was interviewed in Nov 2022. There were 5 interview rounds.
The lifecycle of an activity and fragment refers to the series of states they go through during their existence.
Activities and fragments have similar lifecycle methods such as onCreate(), onStart(), onResume(), onPause(), onStop(), and onDestroy().
The lifecycle of a fragment is tied to the lifecycle of its host activity, while an activity can exist independently.
The lifecycle methods of an activity are called before th...
Lazy refers to delaying the execution of a task until it is actually needed. Init is short for initialization, which is the process of setting up an object or variable before it is used.
Lazy loading is a common technique used in mobile app development to improve performance by only loading data when it is needed.
Init methods are commonly used in object-oriented programming to set up an object's properties or variables ...
I learned Android through online courses, documentation, and practice.
To learn Android, I took online courses on platforms like Udemy and Coursera.
I also read through the official Android documentation to gain a deeper understanding of the framework.
Finally, I practiced building apps on my own and through tutorials to solidify my knowledge.
I also participated in online communities like Stack Overflow to learn from othe
The project can be shared with the client through various methods such as email, cloud storage, or version control systems.
Create a build of the project
Upload the build to a cloud storage service such as Dropbox or Google Drive
Share the link to the build with the client
Use a version control system such as Git to share the project with the client
Provide instructions on how to build and run the project
The developer process for a project involves planning, designing, coding, testing, and deployment.
Plan the project and gather requirements
Design the architecture and user interface
Code the application using best practices and coding standards
Test the application thoroughly to ensure quality and functionality
Deploy the application to the desired platform and monitor its performance
Continuously maintain and update the ap
Scrum and agile methodologies are popular project management frameworks used in software development.
Scrum is a subset of agile and focuses on iterative development with a fixed timeline called sprints.
Agile emphasizes flexibility and collaboration between cross-functional teams.
Both methodologies prioritize delivering working software frequently and responding to change.
Examples of agile practices include daily stand-...
I applied via Naukri.com and was interviewed in Aug 2023. There were 2 interview rounds.
Activity lifecycle refers to the series of states an activity goes through during its lifetime in an Android app.
Activity is created with onCreate() method
Activity is started with onStart() method
Activity is resumed with onResume() method
Activity is paused with onPause() method
Activity is stopped with onStop() method
Activity is destroyed with onDestroy() method
Data binding is a technique in software development that establishes a connection between the UI components and the data sources.
Data binding allows for automatic synchronization of data between the UI and data sources.
It reduces boilerplate code by eliminating the need for manual updates to the UI when data changes.
Data binding can be implemented using frameworks like Android Data Binding Library.
I was interviewed before Mar 2023.
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