Robosoft Technologies IOS Developer Interview Questions and Answers

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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Q1. Types of job in kotlin coroutine
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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
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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
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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?
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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. Interview Questions on Oops, Services, Dagger, Services
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Q1. Self intro,swift basic to advance
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Q1. Self intro , coding and technical question
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Q1. Salary discussion from hr
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Q1. Oops , programming, collection, java basic and Kotlin basic
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Q1. Weak - Strong Difference
Ans. 
Weak - Strong Difference is a common interview question to assess understanding of object-oriented programming concepts.
• Weak references do not prevent the referenced object from being deallocated, while strong references do.

• Weak references are used to avoid retain cycles in iOS development.

• Strong references increase the retain count of an object, keeping it in memory until all strong references are released.
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Q2. Open - Public Difference
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In iOS development, 'open' allows access to the class or method from any module, while 'public' restricts access to the current module only.
• Open access modifier allows classes and methods to be accessed from any module.

• Public access modifier restricts access to the current module only.

• Example: 'open class MyClass' can be accessed from any module, while 'public class MyClass' can only be accessed within the current modu
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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
Answered by AI
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Tata using network layer