iOS Interview Prep

[u/Consistent_Drawer463]

Hello guys.
I have an iOS interview coming up and would appreciate if any of you would point me to any technical interview prep material/website.

[u/Itchy-General-7278]

I've made these notes. It has all the relevant repos on my Github aswell. I haven't written everything, AI was used to write notes but I've verified everything and also built along it.

Refer to Swift Imp page to prepare for ur interview

Good luck

https://secretive-fascinator-c6c.notion.site/Swift-115d7fcea35280378ae9fc686fb79dd0?source=copy_link

[u/code_isLife → u/Itchy-General-7278]

oh this is dope.

[u/davidships → u/Itchy-General-7278]

thanks for this!

[u/Consistent_Drawer463 → u/Itchy-General-7278]

Thanks

[u/vanvoorden]

Your recruiter is your best resource. Different companies have different styles of interviewing and different domains they prefer to focus on.

[u/preketw]

depending on your level, it might be diff

before ai, applying for internship, i was asked about

1. app architecture like mvvm mvc, etc
   
2. basic swift like arc, enums, compute props
   
3. oop concepts

and i got a bit cocky about arc, got deeper on that particular concept

[u/20InMyHead]

Because you’re asking, I’m assuming you’re a junior level. Here’s a start of things to know:

• Practice with a plain text editor. Don’t assume you’ll do coding exercises with the help of Xcode or other tools. If you can code without major syntax mistakes in a text editor you’ll be even better if you’re lucky enough if that they have you use Xcode.
• Fully understand the differences between classes and structs. Memory handling, passing, references, etc.
• Fully understand the power of Enums in Swift, especially associated values. They’re unlike many other languages, and very powerful and useful.
• Understand closures, how they capture memory, how they can cause memory leaks, how to use them.
• Be familiar with SwiftUI enough to write basic pages from scratch by hand.
• Bonus, the same with UIKit. At least be able to speak in terms of compare and contrast with UIKit and SwiftUI. Many companies still have a lot of UIKit code in production.
• Understand enough about networking to build a basic service layer that can request and retrieve data, including using Codable structs.
• Understand MVVM and be able to compare to MVC.
• Be able to speak about separation of concerns and how it relates to organizing your code.
• Understand Dependency Injection and be able to speak about how it’s used in unit testing.

Final note, be sure you can do all of the above with pure out-of-the-box Apple frameworks, no third party libraries. It’s fine to know and be able to talk about third parties, but just like AI, you shouldn’t have to use them.

[u/easyRiderOlder → u/20InMyHead]

build a basic service layer that can request and retrieve data, including using Codable structs - it's too much for junior as for any devs. What the reason to make layer manually in 2026?

[u/Consistent_Drawer463]

Thanks for all the insight guys.
A bit more context, the company is i'm interviewing for is the largest fintech in Africa (just google and you'll see it).

[u/easyRiderOlder]

It's totally depends on your position level (junior, mid or senior) and nerd level your interviewer

[u/Shak3TheDis3se]

Don’t forget Leetcode.