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
Ans. 
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
Ans. 
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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Write a program to print first and last letters of words alternatively from am list

Q1. Explain oops concept and it's pillars
Ans. 
OOPs stands for Object-Oriented Programming. It is based on four main pillars: Inheritance, Encapsulation, Abstraction, and Polymorphism.
• Inheritance: Allows a class to inherit properties and behavior from another class. Example: class B extends class A.

• Encapsulation: Bundling data and methods that operate on the data into a single unit. Example: using private access modifiers to restrict access to certain data.

• Abstract...read more
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Q2. Android architecture , thread v/s coroutine
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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 difference between state object and state?
Ans. 
State object is a specific instance of a state, while state is a general concept representing the condition of a system.
• State object is a concrete representation of a state in a program, containing specific values and properties.

• State is an abstract concept that defines the overall condition or status of a system.

• In iOS development, state object could refer to an instance of a class representing the current state of a ...read more
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Q2. Lazy properties
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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
Answered by AI
Add your answer
Q2. Multithreading in swift
Ans. 
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
Answered by AI
Add your answer