So Delhi Junior IOS Developer Interview Questions and Answers

Q1. 1. Swift UI and iOS Fundamental and OOPS Concept
Add your answer
Q2. Combine Framework
Add your answer
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.
Answered by AI
Add your answer
Q4. Please explain iOS app distributions methods
Ans. 
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.
Answered by AI
Add your answer

Q1. Technical evaluvation
Add your answer

Q1. Behavioural and salary discussion
Add your answer

Q1. Basic technical knowledge question
Add your answer
Q2. Android related questions
Add your answer

Q1. Communication skill
Add your answer
Q2. Salary regarding questions
Add your answer

Q1. Explain App Life Cycle
Ans. 
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
Answered by AI
Add your answer
Q2. Extension of enum
Ans. 
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.
Answered by AI
Add your answer
Q3. Grand central dispatch
Add your answer
Q4. Delegate methods of URL session
Ans. 
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.
Answered by AI
Add your answer
Q5. SSL Pinning. How to achieve?
Ans. 
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
Answered by AI
Add your answer

Q1. Android Activity LifeCycel
Add your answer
Q2. Android Fragment Life Cycle. The interviewer asked me which life cycle methods get triggered in different scenarios.
Add your answer
Q3. Higher Order and Lambda Functions in Kotlin
Ans. 
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
Answered by AI
Add your answer
Q4. Kotlin OOPS concepts - Classes, Objects inheritance, Polymorphism, Encapsulation, Abstraction, Interfaces, Visibility Modifiers, Companion Object, Object Expression, Object Declaration
Add your answer
Q5. Intents, Intent Filter, Broadcast Recievers, Push Notifications
Add your answer
Q6. Unit Testing and UI Testing
Add your answer
Q7. Multi Modular Project structure
Ans. 
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
Answered by AI
Add your answer
Q8. MVVM architecture, VM advantages, Livedata
Add your answer
Q9. Multi Threading, Coroutines
Add your answer
Q10. Dependency Injection
Add your answer
Q11. Showed me Some Kotlin codes and ask me to explain those codes and tell the output
Add your answer
Q12. Null Pointer Prevention and Type safety in kotlin
Ans. 
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
Answered by AI
Add your answer
Q13. Scope functions
Add your answer

Q1. Just basic details like current salary, expectation, Notice Period, Location Preferences
Add your answer

Q1. This was basically salary negotiation round
Add your answer

Easy aptitude english and logical reasoning.

Q1. Tell me About yourself
Add your answer
Q2. Swift advantages and disadvantages
Ans. 
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
Answered by AI
Add your answer

Q1. Salary expectation and current salary
Add your answer

Q1. Explain about protocol extensions
Ans. 
Protocol extensions in iOS allow adding functionality to existing protocols without modifying the original protocol definition.
• Protocol extensions can provide default implementations for protocol methods.

• They can also add new methods and properties to conforming types.

• Protocol extensions are useful for adding common functionality to multiple types that conform to a protocol.

• Example: extending the Equatable protocol to ...read more
Answered by AI
Add your answer
Q2. Difference between merge and rebase
Ans. 
Merge combines changes from different branches, while rebase moves the entire branch to a new base commit.
• Merge creates a new commit to combine changes, while rebase rewrites commit history.

• Merge preserves the commit history of all branches, while rebase creates a linear history.

• Merge is non-destructive and keeps the original branch intact, while rebase modifies the branch being rebased.

• Example: 'git merge feature-bran
Answered by AI
Add your answer
Q3. Explain about Protocol equitability
Ans. 
Protocol equitability ensures that all participants in a communication protocol have equal access and opportunity to send and receive data.
• Ensures fair and equal treatment of all participants in a communication protocol

• Prevents any participant from having an unfair advantage or disadvantage

• Promotes transparency and inclusivity in communication protocols
Answered by AI
Add your answer

Q1. Difference between commit( ) and apply( ) in SharedPreferences?
Ans. 
commit() writes the changes synchronously, apply() writes the changes asynchronously.
• commit() returns a boolean value indicating success or failure, while apply() does not.

• commit() writes the changes immediately to the disk, while apply() writes the changes to the memory first and then to the disk asynchronously.

• apply() is faster than commit() as it writes the changes in the background thread.

• Use commit() when you need...read more
Answered by AI
Add your answer
Q2. Difference between Alpha and Beta testing?
Ans. 
Alpha testing is done by internal teams before release, while beta testing is done by external users after alpha testing.
• Alpha testing is done by internal teams to identify bugs and issues before releasing the software to the public.

• Beta testing is done by external users who are not part of the development team to gather feedback and identify any remaining issues.

• Alpha testing is usually done in a controlled environmen...read more
Answered by AI
Add your answer
Q3. What is Product Flavour?
Ans. 
Product Flavour is a feature in Android development that allows you to create different versions of your app with different configurations.
• Product Flavours are used to create different versions of an app for different purposes or target audiences.

• Each Product Flavour can have its own unique code, resources, and configurations.

• Product Flavours are defined in the build.gradle file of an Android project.

• Examples of Produc...read more
Answered by AI
View 1 more amswer
Q4. Can we use Activity without XML?
Ans. 
Yes, we can use Activity without XML by programmatically creating the UI elements.
• Activities can be created and managed entirely in code without using XML layouts.

• UI elements can be added to the activity using Java code.

• This approach is useful for creating dynamic UIs or for cases where XML layouts are not suitable.
Answered by AI
Add your answer
Q5. Can we downgrade the app from PlayStore?
Ans. 
Yes, users can downgrade an app from PlayStore by uninstalling the current version and installing an older version manually.
• Users can uninstall the current version of the app from their device.

• They can then search for the older version of the app APK file online or use a backup they may have.

• After downloading the older version APK, they can manually install it on their device.
Answered by AI
View 1 more amswer