TO THE NEW Mobile Application Developer Interview Questions and Answers

Q1. Types of job in kotlin coroutine
Ans. 
Types of jobs in Kotlin coroutine include launch, async, withContext, and runBlocking.
• launch: starts a new coroutine without blocking the current thread

• async: starts a new coroutine and returns a Deferred object with a result

• withContext: switches the coroutine context within a coroutine

• runBlocking: blocks the current thread until the coroutine inside it is completed
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Q2. What is Flow, Channel diffrent between StateFlow and SharedFlow
Ans. 
Flow is a cold asynchronous data stream, Channel is a hot asynchronous data stream. StateFlow is a hot asynchronous data stream with a state, SharedFlow is a hot asynchronous data stream without a state.
• Flow is a cold asynchronous data stream that emits values one by one.

• Channel is a hot asynchronous data stream that can have multiple subscribers.

• StateFlow is a hot asynchronous data stream that retains the most recent ...read more
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Q3. If Flow lifecycle aware
Ans. 
Flow lifecycle aware means using Kotlin Flow with lifecycle awareness in Android development.
• Flow lifecycle aware helps manage data streams in Android apps

• It ensures that data emissions are only observed when the lifecycle is in the appropriate state

• Example: Using Flow with LiveData to update UI components based on lifecycle events
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Q4. What is inline function and highorder function?
Ans. 
Inline functions are functions that are expanded in place at the call site, while high-order functions are functions that can take other functions as parameters or return them.
• Inline functions are expanded in place at the call site to improve performance.

• High-order functions can take other functions as parameters or return them.

• Example of high-order function: map() function in Kotlin.
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Q1. Explain hooks in react
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Hooks are a new addition in React 16.8 that allow you to use state and other React features without writing a class.
• Hooks are functions that let you use state and other React features in functional components.

• useState() is a hook that allows you to add state to functional components.

• useEffect() is a hook that allows you to perform side effects in functional components.

• Custom hooks are reusable functions that can contai...read more
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Create weather application in react native with unit test scripts

Q1. Oops based question
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Q2. Solid principles and how to implement
Ans. 
Solid principles are a set of five design principles for writing maintainable and scalable code.
• Single Responsibility Principle: A class should have only one reason to change.

• Open/Closed Principle: Classes should be open for extension but closed for modification.

• Liskov Substitution Principle: Objects of a superclass should be replaceable with objects of its subclasses without affecting the program's correctness.

• Interfa...read more
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Tata using network layer

Q1. Interview Questions on Oops, Services, Dagger, Services
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Q1. Oops , programming, collection, java basic and Kotlin basic
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Q1. What are the different types of interfaces?
Ans. 
Different types of interfaces include user interfaces, hardware interfaces, and software interfaces.
• User interfaces: allow users to interact with the system, such as graphical user interfaces (GUI) and command-line interfaces (CLI)

• Hardware interfaces: connect hardware components to the system, such as USB, HDMI, and Ethernet ports

• Software interfaces: define how software components interact with each other, such as appl...read more
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Q2. What is the output of the program when the expression is evaluated as 0 divided by 7?
Ans. 
The output of the program when 0 is divided by 7 is 0.
• Division of 0 by any number results in 0.

• In programming languages, dividing by 0 usually results in an error or undefined behavior.
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Q3. What are coroutines, scope functions, and visibility modifiers?
Ans. 
Coroutines, scope functions, and visibility modifiers are key concepts in Kotlin programming for Android development.
• Coroutines are a way to perform asynchronous programming in a sequential manner. They allow for non-blocking operations.

• Scope functions are functions that allow you to execute a block of code within the context of an object. Examples include 'let', 'apply', 'run', 'also', and 'with'.

• Visibility modifiers ...read more
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Q1. What is the MVVM (Model-View-ViewModel) architectural pattern?
Ans. 
MVVM is an architectural pattern that separates the user interface from the business logic and data handling in Android development.
• Model represents the data and business logic of the application.

• View is responsible for displaying the UI elements and sending user interactions to the ViewModel.

• ViewModel acts as a mediator between the Model and the View, handling the communication and data flow.

• MVVM helps in achieving se...read more
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Q2. What are the reasons for using that, and what are its pros and cons?
Ans. 
Using dependency injection in Android development can improve code maintainability and testability.
• Pros: easier to manage dependencies, promotes code reusability, facilitates unit testing

• Cons: initial setup can be complex, may introduce overhead in smaller projects

• Example: Using Dagger 2 for dependency injection in an Android project
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Q3. Questions related Dependency injection dagger-hilt / koin
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MC- Android Java related Questions

Q1. Kotlin coroutine related, Comparison of Architecture
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Q1. Basic interview question
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Q1. Basic interview questions
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Q1. Basic info of application development and upload process
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