Infinite Computer Solutions Senior IOS Developer Interview Questions, Process, and Tips

Q1. Explain MVVM and its pros/cons
Ans. 
MVVM is a design pattern that separates the UI, business logic, and data layers in an iOS application.
• 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 the presentation logic and data binding.

• Pros: Separation of concerns, easier to maintain and test, promotes reusability.

• Cons: Increase...read more
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Q2. Multithreading in swift
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Multithreading in Swift allows for concurrent execution of tasks to improve performance and responsiveness.
• Use Grand Central Dispatch (GCD) for managing concurrent tasks

• Avoid blocking the main thread to prevent UI freezes

• Consider using Operation and OperationQueue for more complex task management
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Complex Question are there like images patter and we have to predict next image

There are two task for coding. both are easy.

Q1. What is MVVM and how to bind data using MVVM
Ans. 
MVVM is a design pattern that separates the UI from the business logic by introducing a middle layer called ViewModel.
• Model-View-ViewModel design pattern

• ViewModel acts as a link between the Model and View

• Data binding is used to connect the ViewModel to the View

• Updates in the ViewModel automatically reflect in the View
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Q2. What is SSL pinning
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SSL pinning is a security measure used to prevent man-in-the-middle attacks by associating a specific SSL certificate with a particular app.
• SSL pinning involves hardcoding the expected SSL certificate or public key within the mobile app.

• This helps verify the server's identity and prevent attackers from intercepting and decrypting communication.

• SSL pinning can be implemented using libraries like TrustKit or manually by ...read more
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Q1. Covered the basics of android
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Q1. This was supposed to be a client technical round but they took the in-house technical round instead. They said the feedback of the interview was good and they'll schedule the client technical round but no ...read more
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Q1. State vs Props, about Redux, deployment process, how to access Native modules(bridging), about camera access, why we need scrollview, what is JSX, what is firebase and push notification process, tel...read more
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Q1. What is StateHoist?
Ans. 
StateHoist is a library in Android development used for managing the lifecycle of Android components.
• StateHoist helps in handling configuration changes and other lifecycle events in Android apps.

• It simplifies the process of saving and restoring instance state of activities and fragments.

• StateHoist can be used to retain data across configuration changes, such as screen rotations.

• It provides a convenient way to manage th...read more
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Q2. How does ViewModel work?
Ans. 
ViewModel is a class that is designed to store and manage UI-related data in a lifecycle conscious way.
• ViewModel survives configuration changes such as screen rotations.

• ViewModel is not destroyed when an activity is destroyed and recreated.

• ViewModel is typically used to hold and manage data for UI components such as activities and fragments.
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Q3. What is SOLID Principle?
Ans. 
SOLID is a set of five principles in object-oriented programming to make software designs more understandable, flexible, and maintainable.
• S - Single Responsibility Principle: A class should have only one reason to change.

• O - Open/Closed Principle: Software entities should be open for extension but closed for modification.

• L - Liskov Substitution Principle: Objects of a superclass should be replaceable with objects of it...read more
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Q1. Questions related to koltin
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Q2. Jetpack compose uses
Ans. 
Jetpack Compose is a modern Android UI toolkit that simplifies and accelerates UI development.
• Declarative UI: Jetpack Compose allows developers to build UI using a declarative programming model.

• State management: Jetpack Compose handles state management efficiently, making it easier to update UI based on data changes.

• Compose functions: Developers can create reusable UI components using Compose functions.

• Interoperability...read more
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Q3. Difference between remember and rememberSaveable
Ans. 
remember is used to store a value in a composable function, while rememberSaveable is used to store a value that survives configuration changes.
• remember is used to store a value that does not survive configuration changes

• rememberSaveable is used to store a value that survives configuration changes, such as rotation of the device

• rememberSaveable is typically used for storing view model data in Jetpack Compose
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Q4. Coroutines parallel and sequential processing
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Basic aptitude questions with no negative marking. 20 minutes 30 questions

2 String manipulation questions

Q1. Basic level Swift MCQ Questions
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Q1. 30-45 minutes one on one ios interview, Asked memory management, lifecycle, core data questions
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Q1. 30 minutes one on one ios interview. asked questions around concurrency, why swift is called POP, In detail rigorous interview.
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