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Lead Ios Developer Interview Questions

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6,263 lead ios developer interview questions shared by candidates

What do you like in Swift and also what you don't like? What is the difference between arrays and sets? What is the difference between a class and a struct, and when should we use them? What is dif between reference and value type? ARC: What is weak, unowned, a retain cycle, and how to prevent it? How do you trace memory leaks? What architectures do you know and use? Describe the advantages and disadvantages of MVC and MVVM. Navigation issues with MVVM. How can objects share properties? Name all possibilities for that. How can we expand a struct without mutating it? What is dependency injection, its purpose, and usage? What is the difference between UIKit and SwiftUI? What do you like most and why? What are @State and @Binding? Multithreading. How can you achieve multithreading in iOS? What is a deadlock, and how do you prevent it? What is a race condition, when does it occur, and how do you prevent it? How do you wait until all three API calls complete before showing the UI to the user? Name an analogue of DispatchGroup. What is the difference between zip and CombineLatest?
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Junior IOS Developer

Interviewed at CHECK24

3.5★
May 6, 2024

What do you like in Swift and also what you don't like? What is the difference between arrays and sets? What is the difference between a class and a struct, and when should we use them? What is dif between reference and value type? ARC: What is weak, unowned, a retain cycle, and how to prevent it? How do you trace memory leaks? What architectures do you know and use? Describe the advantages and disadvantages of MVC and MVVM. Navigation issues with MVVM. How can objects share properties? Name all possibilities for that. How can we expand a struct without mutating it? What is dependency injection, its purpose, and usage? What is the difference between UIKit and SwiftUI? What do you like most and why? What are @State and @Binding? Multithreading. How can you achieve multithreading in iOS? What is a deadlock, and how do you prevent it? What is a race condition, when does it occur, and how do you prevent it? How do you wait until all three API calls complete before showing the UI to the user? Name an analogue of DispatchGroup. What is the difference between zip and CombineLatest?

It was clearly mentioned in my resume and informed HR that I have a good knowledge of Swift language not objective c. Interview well went in Swift and It was all good but at the end I came to know I was not selected because I don't have a good objective c knowledge. If you are calling a senior person in week days for interview please try to go through resume clearly once. Before I came for interview i was having a lot positive about company but now even they will offer me I won't be joining there. Thanks for reminding my importance.
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Ios Developer

Interviewed at Q3 Technologies

4.1★
Sep 22, 2016

It was clearly mentioned in my resume and informed HR that I have a good knowledge of Swift language not objective c. Interview well went in Swift and It was all good but at the end I came to know I was not selected because I don't have a good objective c knowledge. If you are calling a senior person in week days for interview please try to go through resume clearly once. Before I came for interview i was having a lot positive about company but now even they will offer me I won't be joining there. Thanks for reminding my importance.

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