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HCLTech IOS Developer Interview Questions and Answers

Updated 14 Sep 2024

9 Interview questions

An IOS Developer was asked 9mo ago
Q. What is the MVVM architecture?
Ans. 

MVVM is an architectural design pattern that separates the user interface code from the business logic and data model.

  • MVVM stands for Model-View-ViewModel

  • Model represents the data and business logic

  • View displays the UI elements and interacts with the user

  • ViewModel acts as a mediator between the Model and View, handling user inputs and updating the Model

  • MVVM helps in achieving separation of concerns and making the ...

An IOS Developer was asked 9mo ago
Q. What are the differences between classes and structs?
Ans. 

Classes are reference types, while structs are value types in Swift.

  • Classes are reference types, meaning they point to the same instance in memory when assigned to a new variable.

  • Structs are value types, meaning they create a new copy when assigned to a new variable.

  • Classes support inheritance, while structs do not.

  • Classes can have deinitializers, while structs cannot.

  • Example: class Person { var name: String } vs ...

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Q5. What is optional, difference between struct and class?
An IOS Developer was asked 9mo ago
Q. What is Codable?
Ans. 

Codable is a protocol in Swift that allows for easy encoding and decoding of data types to and from external representations.

  • Codable protocol is used to convert custom data types to and from external representations such as JSON, plist, etc.

  • It requires the types to conform to Encodable and Decodable protocols.

  • Codable protocol provides default implementations for encoding and decoding.

  • Example: struct Person: Codabl...

An IOS Developer was asked 9mo ago
Q. What is serialization in API?
Ans. 

Serialisation in API is the process of converting data into a format that can be easily transmitted over a network.

  • Serialisation is used to convert complex data structures into a format that can be easily transmitted over a network.

  • It involves converting objects or data structures into a stream of bytes that can be sent over a network.

  • JSON and XML are commonly used formats for serialising data in APIs.

  • Serialisatio...

An IOS Developer was asked 9mo ago
Q. What is the difference between guard let and if let?
Ans. 

Guard let and if let are both used for optional binding in Swift, but they have different scopes and control flow behaviors.

  • guard let is used for early exits; if the condition fails, it exits the current scope.

  • if let allows you to safely unwrap optionals, but does not require an early exit.

  • Example of guard let: guard let value = optionalValue else { return } // exits if optionalValue is nil.

  • Example of if let: if l...

An IOS Developer was asked 9mo ago
Q. Regarding the singleton pattern, is it thread-safe?
Ans. 

Singletons can be thread-safe, but it depends on the implementation. Proper techniques must be used to ensure safety.

  • Use dispatch_once in Objective-C for thread-safe singleton creation.

  • In Swift, use a static constant to ensure thread safety.

  • Example in Objective-C: + (instancetype)sharedInstance { static MyClass *sharedInstance; static dispatch_once_t onceToken; dispatch_once(&onceToken, ^{ sharedInstance = [[s...

An IOS Developer was asked 9mo ago
Q. What is the identifiable protocol?
Ans. 

The Identifiable protocol in Swift provides a way to uniquely identify instances of a type.

  • Conforms to Identifiable by implementing a 'var id: UUID { get }' property.

  • Useful in SwiftUI for lists and dynamic views to track changes.

  • Example: struct User: Identifiable { var id = UUID(); var name: String }

  • Helps in differentiating between items in a collection.

Are these interview questions helpful?
An IOS Developer was asked 12mo ago
Q. What are the differences between defer and guard statements?
Ans. 

diff is used to compare two collections and return the differences, while guard is used for early exit in a function if a condition is not met.

  • diff is a method used in Swift to compare two collections and return the differences.

  • guard is a keyword used in Swift to provide an early exit from a function if a condition is not met.

  • Example: let array1 = [1, 2, 3, 4], array2 = [3, 4, 5, 6]; let result = array1.diff(array...

An IOS Developer was asked 12mo ago
Q. What is GCD and Multitreadung
Ans. 

GCD stands for Grand Central Dispatch, a technology used in iOS for managing concurrent operations. Multithreading is the ability of a CPU to execute multiple threads concurrently.

  • GCD is used for managing tasks asynchronously and efficiently utilizing system resources.

  • Multithreading allows multiple tasks to run concurrently, improving performance and responsiveness of an application.

  • Example: Using GCD to download ...

HCLTech IOS Developer Interview Experiences

3 interviews found

IOS Developer Interview Questions & Answers

user image MANICKAM V

posted on 15 Jun 2024

Interview experience
5
Excellent
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Technical 

(2 Questions)

  • Q1. Diff b/w diff and guard
  • Ans. 

    diff is used to compare two collections and return the differences, while guard is used for early exit in a function if a condition is not met.

    • diff is a method used in Swift to compare two collections and return the differences.

    • guard is a keyword used in Swift to provide an early exit from a function if a condition is not met.

    • Example: let array1 = [1, 2, 3, 4], array2 = [3, 4, 5, 6]; let result = array1.diff(array2) //...

  • Answered by AI
  • Q2. What is GCD and Multitreadung
  • Ans. 

    GCD stands for Grand Central Dispatch, a technology used in iOS for managing concurrent operations. Multithreading is the ability of a CPU to execute multiple threads concurrently.

    • GCD is used for managing tasks asynchronously and efficiently utilizing system resources.

    • Multithreading allows multiple tasks to run concurrently, improving performance and responsiveness of an application.

    • Example: Using GCD to download image...

  • Answered by AI

Skills evaluated in this interview

IOS Developer Interview Questions & Answers

user image Anonymous

posted on 14 Sep 2024

Interview experience
5
Excellent
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
No response

I applied via Walk-in and was interviewed before Sep 2023. There were 2 interview rounds.

Round 1 - Technical 

(14 Questions)

  • Q1. What is serialisation in API
  • Ans. 

    Serialisation in API is the process of converting data into a format that can be easily transmitted over a network.

    • Serialisation is used to convert complex data structures into a format that can be easily transmitted over a network.

    • It involves converting objects or data structures into a stream of bytes that can be sent over a network.

    • JSON and XML are commonly used formats for serialising data in APIs.

    • Serialisation is ...

  • Answered by AI
  • Q2. What is codable
  • Ans. 

    Codable is a protocol in Swift that allows for easy encoding and decoding of data types to and from external representations.

    • Codable protocol is used to convert custom data types to and from external representations such as JSON, plist, etc.

    • It requires the types to conform to Encodable and Decodable protocols.

    • Codable protocol provides default implementations for encoding and decoding.

    • Example: struct Person: Codable { v...

  • Answered by AI
  • Q3. What is MVVM architecture
  • Ans. 

    MVVM is an architectural design pattern that separates the user interface code from the business logic and data model.

    • MVVM stands for Model-View-ViewModel

    • Model represents the data and business logic

    • View displays the UI elements and interacts with the user

    • ViewModel acts as a mediator between the Model and View, handling user inputs and updating the Model

    • MVVM helps in achieving separation of concerns and making the code ...

  • Answered by AI
  • Q4. Solid principles
  • Q5. Coredata stack questions
  • Q6. Swift Optional related
  • Q7. About GCD, Concurrency
  • Q8. Dependency injection and inversion
  • Q9. About singleton, is it thread safe ?
  • Ans. 

    Singletons can be thread-safe, but it depends on the implementation. Proper techniques must be used to ensure safety.

    • Use dispatch_once in Objective-C for thread-safe singleton creation.

    • In Swift, use a static constant to ensure thread safety.

    • Example in Objective-C: + (instancetype)sharedInstance { static MyClass *sharedInstance; static dispatch_once_t onceToken; dispatch_once(&onceToken, ^{ sharedInstance = [[self a...

  • Answered by AI
  • Q10. Guard let, if let difference
  • Ans. 

    Guard let and if let are both used for optional binding in Swift, but they have different scopes and control flow behaviors.

    • guard let is used for early exits; if the condition fails, it exits the current scope.

    • if let allows you to safely unwrap optionals, but does not require an early exit.

    • Example of guard let: guard let value = optionalValue else { return } // exits if optionalValue is nil.

    • Example of if let: if let va...

  • Answered by AI
  • Q11. Failable initialisers
  • Q12. Class struct difference
  • Ans. 

    Classes are reference types, while structs are value types in Swift.

    • Classes are reference types, meaning they point to the same instance in memory when assigned to a new variable.

    • Structs are value types, meaning they create a new copy when assigned to a new variable.

    • Classes support inheritance, while structs do not.

    • Classes can have deinitializers, while structs cannot.

    • Example: class Person { var name: String } vs struc...

  • Answered by AI
  • Q13. About protocols, associated type, delegate examples
  • Q14. About identifiable protocol
  • Ans. 

    The Identifiable protocol in Swift provides a way to uniquely identify instances of a type.

    • Conforms to Identifiable by implementing a 'var id: UUID { get }' property.

    • Useful in SwiftUI for lists and dynamic views to track changes.

    • Example: struct User: Identifiable { var id = UUID(); var name: String }

    • Helps in differentiating between items in a collection.

  • Answered by AI
Round 2 - HR 

(1 Question)

  • Q1. When you can join
  • Ans. 

    I can join within 2 weeks of receiving an offer.

    • I can start within 2 weeks of receiving an offer

    • I need to give notice at my current job before starting

    • I have some personal commitments that I need to wrap up before joining

  • Answered by AI

Skills evaluated in this interview

IOS Developer Interview Questions & Answers

user image Arvind Patel

posted on 3 Jun 2022

Round 1 - Technical 

(1 Question)

  • Q1. Basic of Swift and Objective C
Round 2 - One-on-one 

(1 Question)

  • Q1. Pure Technical Asking about your Project
Round 3 - HR 

(1 Question)

  • Q1. Salary Descussion with HR and normal HR Question

Interview Preparation Tips

Interview preparation tips for other job seekers - Make you technical strong and prepare DS Question as well

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Interview questions from similar companies

I applied via Recruitment Consulltant and was interviewed before Feb 2021. There was 1 interview round.

Round 1 - Technical 

(1 Question)

  • Q1. What is optional, difference between struct and class?
  • Ans. 

    Optional is a type in Swift that can hold a value or be nil. Struct and class are both used to define custom data types.

    • Optional is denoted by a question mark (?) and is used to handle nil values.

    • Structs are value types and are passed by value, while classes are reference types and are passed by reference.

    • Structs have a default memberwise initializer, while classes do not.

    • Classes can inherit from other classes, while s...

  • Answered by AI

Interview Preparation Tips

Interview preparation tips for other job seekers - Study the basics, and the interview depends on client requirement.

Skills evaluated in this interview

I applied via Company Website and was interviewed in Jul 2020. There was 1 interview round.

Interview Questionnaire 

4 Questions

  • Q1. All basics of swift. Enums optionals closures protocols etc
  • Q2. Best feature you like of swift
  • Q3. App live all steps
  • Q4. Certificates information

Interview Preparation Tips

Interview preparation tips for other job seekers - They will ask you everything about swift

Interview Questionnaire 

2 Questions

  • Q1. Struct vs Class
  • Ans. 

    Struct is value type while Class is reference type in Swift. Structs are passed by value while Classes are passed by reference.

    • Structs are ideal for small data types like coordinates, colors, etc.

    • Classes are ideal for larger data types like view controllers, network managers, etc.

    • Structs are immutable by default while Classes are mutable.

    • Structs cannot inherit from other types while Classes can.

    • Structs are stack alloca...

  • Answered by AI
  • Q2. MultiThreading Related Questions

Interview Preparation Tips

Interview preparation tips for other job seekers - Strong basic knowledge required

Skills evaluated in this interview

Interview Questionnaire 

6 Questions

  • Q1. What’s difference between class and structure
  • Ans. 

    Classes and structures are both used to define custom data types, but they have some key differences.

    • Classes are reference types, while structures are value types.

    • Classes support inheritance, while structures do not.

    • Classes have deinitializers, while structures do not.

    • Classes have reference counting for memory management, while structures do not.

    • Classes can have optional property types, while structures cannot.

  • Answered by AI
  • Q2. What’s retain cycle how you can avoid
  • Ans. 

    Retain cycle is a memory management issue where objects reference each other and cannot be released. It can be avoided by using weak or unowned references.

    • Retain cycle occurs when two or more objects hold strong references to each other.

    • To avoid retain cycle, use weak or unowned references instead of strong references.

    • Weak references do not increase the reference count of an object and automatically become nil when the...

  • Answered by AI
  • Q3. What’s opinion binding
  • Ans. 

    Opinion binding is a legal doctrine that requires judges to follow the decisions of higher courts in similar cases.

    • Opinion binding is also known as stare decisis.

    • It helps to ensure consistency and predictability in the legal system.

    • For example, if a higher court has already ruled that a certain law is unconstitutional, lower courts must follow that ruling in similar cases.

    • Opinion binding can be controversial, as it can...

  • Answered by AI
  • Q4. Difference between GCD and operation Queues
  • Ans. 

    GCD and Operation Queues are both used for concurrent programming in iOS, but differ in their approach.

    • GCD is a C-based API that uses a thread pool model for concurrency.

    • Operation Queues are built on top of GCD and provide a higher-level abstraction for concurrency.

    • GCD is best for simple, lightweight tasks, while Operation Queues are better for more complex tasks with dependencies.

    • GCD uses blocks for task execution, wh...

  • Answered by AI
  • Q5. Explain the Life cycle of iOS applications
  • Ans. 

    The life cycle of iOS applications refers to the stages an app goes through from launch to termination.

    • The app is launched by the user or system

    • The app enters the foreground and becomes active

    • The app can be sent to the background or suspended

    • The app can be terminated by the user or system

    • The app can be resumed from the background or suspended state

    • The app can receive memory warnings and handle them appropriately

  • Answered by AI
  • Q6. Explain the life cycle of UIviewController
  • Ans. 

    The UIViewController life cycle consists of several stages that occur when the view controller is loaded and unloaded.

    • viewDidLoad() - called when the view controller's view is loaded into memory

    • viewWillAppear() - called just before the view appears on the screen

    • viewDidAppear() - called just after the view appears on the screen

    • viewWillDisappear() - called just before the view disappears from the screen

    • viewDidDisappear()...

  • Answered by AI

Skills evaluated in this interview

Are these interview questions helpful?
Interview experience
4
Good
Difficulty level
Easy
Process Duration
Less than 2 weeks
Result
Not Selected

I applied via LinkedIn and was interviewed in Aug 2023. There were 2 interview rounds.

Round 1 - Coding Test 

Remove duplicate elements from list.

Round 2 - HR 

(2 Questions)

  • Q1. What is the reason to change the job?
  • Ans. 

    I seek new challenges and opportunities for growth that align with my career goals and personal development as an iOS Developer.

    • Desire for professional growth: I'm looking for a role that offers more opportunities for learning and advancement.

    • Seeking new challenges: I want to work on innovative projects that push my skills further, like developing apps with SwiftUI.

    • Cultural fit: I'm looking for a company culture that a...

  • Answered by AI
  • Q2. I was exploring for growth opportunities and IBM is a good organization to grow looking at its ML technologies IBMWatson.

I applied via LinkedIn and was interviewed in Jan 2022. There was 1 interview round.

Round 1 - Technical 

(1 Question)

  • Q1. Swift basic questions

Interview Preparation Tips

Interview preparation tips for other job seekers - Basic swift question and oops concepts, previous project overview.

I applied via Naukri.com and was interviewed in Jan 2022. There were 3 interview rounds.

Round 1 - Technical 

(1 Question)

  • Q1. Basic iOS Questions which you can find from the internet What is Class & Structure Optional, Tupple
Round 2 - Behavioral 

(1 Question)

  • Q1. Tricky question based upon manager Team management Handling multiple junior developers under you.
Round 3 - HR 

(4 Questions)

  • Q1. What are your salary expectations?
  • Ans. 

    I expect a competitive salary based on my experience and skills.

    • I have a strong background in iOS development and have successfully completed several projects.

    • I am familiar with the latest technologies and frameworks in iOS development.

    • I have a proven track record of delivering high-quality code on time and within budget.

    • I am confident that my skills and experience make me a valuable asset to any team.

    • I am open to disc...

  • Answered by AI
  • Q2. Share details of your previous job.
  • Ans. 

    I worked as an iOS Developer at XYZ Company.

    • Developed and maintained iOS applications using Swift and Objective-C.

    • Collaborated with cross-functional teams to gather requirements and deliver high-quality products.

    • Implemented new features and enhancements based on user feedback.

    • Optimized app performance and resolved bugs and issues.

    • Worked on integrating third-party libraries and APIs.

    • Participated in code reviews and prov...

  • Answered by AI
  • Q3. Why are you looking for a change?
  • Ans. 

    I am looking for a change to explore new opportunities and challenges in my career.

    • Seeking growth and advancement in my professional journey

    • Want to work on more challenging projects

    • Desire to learn new technologies and expand my skillset

    • Looking for a better work-life balance

    • Seeking a company culture that aligns with my values and goals

  • Answered by AI
  • Q4. Tell me about yourself.
  • Ans. 

    I am an experienced iOS developer with a passion for creating user-friendly and efficient applications.

    • I have been developing iOS applications for over 5 years.

    • I am proficient in Swift and Objective-C programming languages.

    • I have experience working with various frameworks and libraries such as UIKit, Core Data, and Alamofire.

    • I have a strong understanding of iOS design patterns and best practices.

    • I have successfully del...

  • Answered by AI

Interview Preparation Tips

Topics to prepare for LTIMindtree IOS Developer interview:
  • Swift
  • Objective C
  • IOS
Interview preparation tips for other job seekers - Prepare well and make sure you have all of your previous employment certificates ready along with you, they ask you to upload step by step.

HCLTech Interview FAQs

How many rounds are there in HCLTech IOS Developer interview?
HCLTech interview process usually has 2 rounds. The most common rounds in the HCLTech interview process are Technical, HR and One-on-one Round.
How to prepare for HCLTech IOS Developer interview?
Go through your CV in detail and study all the technologies mentioned in your CV. Prepare at least two technologies or languages in depth if you are appearing for a technical interview at HCLTech. The most common topics and skills that interviewers at HCLTech expect are Swift, IOS, Objective C, XCode and GIT.
What are the top questions asked in HCLTech IOS Developer interview?

Some of the top questions asked at the HCLTech IOS Developer interview -

  1. About singleton, is it thread saf...read more
  2. What is serialisation in ...read more
  3. What is MVVM architect...read more

Tell us how to improve this page.

Overall Interview Experience Rating

5/5

based on 2 interview experiences

Difficulty level

Moderate 100%

Duration

Less than 2 weeks 100%
View more
Join HCLTech Find your spark and discover what drives you forward
HCLTech IOS Developer Salary
based on 26 salaries
₹7.1 L/yr - ₹22 L/yr
73% more than the average IOS Developer Salary in India
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HCLTech IOS Developer Reviews and Ratings

based on 4 reviews

4.8/5

Rating in categories

4.8

Skill development

4.8

Work-life balance

4.9

Salary

4.9

Job security

4.8

Company culture

4.8

Promotions

4.8

Work satisfaction

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