NTT Data IOS Team Lead Interview Questions, Process, and Tips

Q1. React native hooks
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Q2. Component architecture
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Q1. Javascript programs
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Q2. Coding
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Q1. Basic ios development questions
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Q2. Core data or any other data base
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Q1. Explain MVVM and its pros/cons
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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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Q1. Basic technical knowledge question
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Q2. Android related questions
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Q1. Communication skill
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Q2. Salary regarding questions
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Q1. Explain App Life Cycle
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App Life Cycle refers to the sequence of events that occur from the time an app is launched until it is terminated.
• App is launched by user or system

• App enters foreground and becomes active

• App enters background when user switches to another app or locks the device

• App may be terminated by the system to free up resources

• App can be brought back to foreground by user or system events
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Q2. Extension of enum
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Extension of enum allows adding new cases, computed properties, and methods to an existing enum type.
• Extensions can be used to add new functionality to existing enum types without modifying their original implementation.

• New cases, computed properties, and methods can be added to an enum using extensions.

• Extensions can also be used to conform an enum to a protocol.
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Q3. Grand central dispatch
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Q4. Delegate methods of URL session
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Delegate methods of URL session are used to handle various events during network requests.
• Delegate methods are used to handle authentication challenges, background session events, and data tasks.

• Examples include URLSessionDelegate, URLSessionDataDelegate, URLSessionTaskDelegate.

• Delegate methods can be used to handle redirects, caching policies, and response validation.
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Q5. SSL Pinning. How to achieve?
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SSL pinning is a security measure used to prevent man-in-the-middle attacks by validating the server's SSL certificate.
• Implement SSL pinning by embedding the server's SSL certificate within the app's code.

• During the SSL handshake, compare the server's certificate with the embedded certificate to ensure they match.

• If the certificates match, the connection is considered secure and the data exchange can proceed.

• SSL pinnin...read more
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Q1. Android Activity LifeCycel
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Q2. Android Fragment Life Cycle. The interviewer asked me which life cycle methods get triggered in different scenarios.
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Q3. Higher Order and Lambda Functions in Kotlin
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Higher Order and Lambda Functions in Kotlin
• Higher order functions are functions that take other functions as parameters or return functions

• Lambda functions are anonymous functions that can be used as arguments or return values in higher order functions

• They provide a concise way to write code and enable functional programming in Kotlin
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Q4. Kotlin OOPS concepts - Classes, Objects inheritance, Polymorphism, Encapsulation, Abstraction, Interfaces, Visibility Modifiers, Companion Object, Object Expression, Object Declaration
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Q5. Intents, Intent Filter, Broadcast Recievers, Push Notifications
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Q6. Unit Testing and UI Testing
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Q7. Multi Modular Project structure
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Multi Modular Project structure is an architectural approach that divides an application into multiple modules for better organization and scalability.
• Divide the application into separate modules based on functionality or features.

• Each module should have its own set of code, resources, and dependencies.

• Modules can communicate with each other through defined interfaces or APIs.

• Modularization helps in code reusability, e...read more
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Q8. MVVM architecture, VM advantages, Livedata
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Q9. Multi Threading, Coroutines
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Q10. Dependency Injection
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Q11. Showed me Some Kotlin codes and ask me to explain those codes and tell the output
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Q12. Null Pointer Prevention and Type safety in kotlin
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Null pointer prevention and type safety in Kotlin
• Kotlin uses nullable and non-nullable types to prevent null pointer exceptions

• The safe call operator '?' can be used to safely access nullable variables

• The '!!' operator can be used to explicitly throw a null pointer exception

• Kotlin's type system ensures type safety by checking types at compile-time
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Q13. Scope functions
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Q1. Just basic details like current salary, expectation, Notice Period, Location Preferences
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Q1. This was basically salary negotiation round
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Easy aptitude english and logical reasoning.

Q1. Tell me About yourself
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Q2. Swift advantages and disadvantages
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Swift is a powerful and modern programming language for iOS development, but it has its own set of advantages and disadvantages.
• Advantages: faster performance, safer code with optionals, easier to read and write code, interoperability with Objective-C

• Disadvantages: steep learning curve for beginners, limited community support compared to other languages like Java or Python
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Q1. Salary expectation and current salary
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Q1. Basics of Android
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Q1. Technical implementation
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Q1. Company fit culture test
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