Infosys Senior Android Application Developer Interview Questions and Answers

Q1. 1. Swift UI and iOS Fundamental and OOPS Concept
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Q2. Combine Framework
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Q3. How to handle Concurrency in swift
Ans. 
Concurrency in Swift can be handled using Grand Central Dispatch (GCD) and Operation Queues.
• Use GCD to perform tasks concurrently by creating dispatch queues.

• Use Operation Queues to manage and execute multiple operations concurrently.

• Avoid race conditions by using serial queues or synchronization techniques like semaphores or locks.
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Q4. Please explain iOS app distributions methods
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iOS app distribution methods include App Store, Ad Hoc, Enterprise, and TestFlight.
• App Store distribution is for public release and requires Apple's review process.

• Ad Hoc distribution allows sharing apps with a limited number of devices.

• Enterprise distribution is for in-house apps within a company.

• TestFlight is for beta testing with external testers before App Store release.
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Q1. Technical evaluvation
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Q1. Behavioural and salary discussion
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Q1. What is virtual dom?
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Virtual DOM is a lightweight copy of the actual DOM, used for efficient updates in React applications.
• Virtual DOM is a concept in React where a lightweight copy of the actual DOM is created.

• It allows React to efficiently update the UI by comparing the virtual DOM with the actual DOM and only making necessary changes.

• This helps in improving performance by reducing the number of direct manipulations to the actual DOM.

• For...read more
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Q2. Whats call, bind, apply?
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call, bind, and apply are methods used to manipulate the context of a function in JavaScript.
• call - calls a function with a given 'this' value and arguments provided individually.

• bind - creates a new function that, when called, has its 'this' keyword set to the provided value.

• apply - calls a function with a given 'this' value and arguments provided as an array.
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Q1. Data class in kotlin
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Data class in Kotlin is used to represent a simple data container with automatically generated methods like equals(), hashCode(), toString(), and copy().
• Data classes are declared using the 'data' keyword before the class keyword.

• Properties of data classes are automatically generated component functions for destructuring declarations.

• Data classes cannot be abstract, open, sealed, or inner.

• Example: data class User(val na
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Q2. Scope functions
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Q3. Explain viewmodel and mvvm
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ViewModel is a class that stores and manages UI-related data in a lifecycle-conscious way. MVVM is an architectural pattern that separates the UI from the business logic.
• ViewModel is part of the Android Architecture Components and is used to store and manage UI-related data in a lifecycle-conscious way.

• ViewModel survives configuration changes such as screen rotations and retains its data.

• MVVM stands for Model-View-View...read more
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Q4. Higher order functions
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Q1. All technical Jetpack concept no DSA questions and asked all theoretical questions
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Q2. What are coroutine, how to secure ur app data, network call in android , ssl pinning, notification's implementation through FCM, android basic questions
Ans. 
Coroutines are a way to perform asynchronous operations in Android, securing app data involves encryption, SSL pinning enhances security, FCM for notifications.
• Coroutines are used for managing asynchronous operations in Android, allowing for efficient and non-blocking code execution.

• Securing app data involves using encryption techniques such as AES to protect sensitive information from unauthorized access.

• SSL pinning i...read more
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Q1. No one join in interview
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Q1. No Question and no one joined
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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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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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