Apexon Senior IOS Developer Interview Questions and Answers

Q1. Atomic vs Non-Atomic
Ans. 
Atomic means thread-safe access, non-atomic is not thread-safe
• Atomic ensures that a property is always fully set or retrieved, while non-atomic does not guarantee this

• Atomic properties are slower due to the overhead of ensuring thread safety

• Non-atomic properties are faster but can lead to data corruption in a multi-threaded environment
Answered by AI
Add your answer
Q2. SSL Pinning with different ways
Ans. 
SSL pinning is a security measure to prevent man-in-the-middle attacks by associating a specific SSL certificate with a particular app.
• Implementing SSL pinning using public key

• Implementing SSL pinning using certificate

• Implementing SSL pinning using hash of certificate
Answered by AI
Add your answer

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
Answered by AI
Add your answer
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
Answered by AI
Add your answer
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
Answered by AI
Add your answer
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.
Answered by AI
Add your answer

Q1. How react native works under the hood?
Ans. 
React Native works by running JavaScript code on a separate thread and communicating with native modules through a bridge.
• React Native runs JavaScript code on a separate thread called the JavaScript thread.

• It communicates with native modules through a bridge, which allows JavaScript to interact with platform-specific APIs.

• The bridge passes messages between the JavaScript thread and the native modules, enabling seamless...read more
Answered by AI
Add your answer

Q1. Mostly in automotive android
Add your answer
Q2. What is car propertymanager and mostly in to aosp
Ans. 
Car propertymanager is a component in AOSP that manages properties related to car-specific features.
• Car propertymanager is used to handle properties like car make, model, year, etc.

• It is mostly used in Android Automotive OS for managing car-specific settings and configurations.

• Developers can use car propertymanager to access and modify car-related properties in their apps.
Answered by AI
Add your answer

Q1. Software skills assessment
Add your answer

Q1. More than technical it was soft skills assessment
Add your answer

Q1. Oops based question
Add your answer
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
Answered by AI
Add your answer

Tata using network layer

Q1. Basic Android questions and Kotlin
Add your answer

Q1. Architecture like MVVM explain
Ans. 
MVVM is an architectural pattern that separates the UI, business logic, and data layers in an Android app.
• Model: Represents the data and business logic of the application.

• View: Represents the UI components of the application.

• ViewModel: Acts as a mediator between the Model and View, handling communication and logic.

• Data binding: Allows automatic updates between the ViewModel and View.

• Example: Using LiveData to observe c
Answered by AI
Add your answer

Q1. What is circular reference cycle
Ans. 
Circular reference cycle occurs when two or more objects reference each other, creating an infinite loop.
• Circular reference cycle can lead to memory leaks as the objects involved will never be deallocated.

• To prevent circular reference cycles, weak references can be used in one of the objects.

• Example: Object A has a strong reference to Object B, and Object B has a strong reference to Object A, creating a circular refere
Answered by AI
Add your answer
Q2. What is Actor in swift
Add your answer

Q1. Explain hooks in react
Ans. 
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
Answered by AI
Add your answer

Create weather application in react native with unit test scripts