100 Practical Questions for Middle iOS Engineers
This question bank contains 100 practical interview questions designed for intermediate iOS developers who want to perform confidently in technical interview rounds.
Instead of memorising definitions, these questions challenge you to explain your decisions, discuss architecture, optimise performance, and solve real-world development problems.
Designed for developers who:
- Have 1–3 years of iOS experience
- Have built or shipped at least one app
- Want to improve technical interview performance
- Are preparing for product companies and startups
Perfect for iOS developers preparing for technical interviews after gaining professional experience.
- Advanced Swift
- Memory Management
- Closures & Error Handling
- Protocol-Oriented Programming
- MVVM & Architecture
- Dependency Injection
- UIKit & SwiftUI
- Navigation
- Networking
- URLSession
- Concurrency
- Performance
- Debugging
- Real-World Decisions
100 questionsQuestions only
Sample questions
- 1.
What is Swift and why did Apple introduce it instead of Objective-C?
- 2.
What is the difference between let and var, and why does it matter?
- 3.
What are Optionals and why are they important for safety in Swift?
- 4.
What does nil represent and why can it be dangerous if not handled properly?
- 5.
What is the difference between if let and guard let, and why is guard often preferred?
- 6.
What is type inference and why does Swift rely on it?
- 7.
What is a function in Swift and why are functions first-class citizens?
- Question preview locked
- Question preview locked
- Question preview locked
Unlock full bank
90 more questions waiting
Question titles only — no answers. Practice out loud, mark gaps, and revise before interviews. Unlock requires a signed-in account.