Swift Interview

Beginner

100 Must-Know Questions for Your First iOS Interview

This question bank contains 100 carefully curated interview questions that cover the fundamental concepts every beginner iOS developer should know before stepping into an interview.

Designed for students, freshers, and junior iOS developers, this question bank helps you focus on the topics interviewers ask most frequently.

Perfect for students, freshers, and junior iOS developers preparing for their first or second iOS interview.

  • Swift Basics
  • Optionals & Closures
  • Struct vs Class
  • ARC & Memory
  • Protocols & Codable
  • App Lifecycle
  • ViewController Lifecycle
  • Auto Layout
  • MVC
  • UIKit
  • SwiftUI
  • Navigation
  • Table & Collection Views
  • Networking
  • URLSession
  • JSON
  • Debugging
  • Testing
  • Clean Code

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Sample questions

  1. 1.

    What is Swift, and why did Apple introduce it?

  2. 2.

    What is the difference between let and var?

  3. 3.

    What are optionals?

  4. 4.

    Why are optionals important in Swift?

  5. 5.

    What is nil?

  6. 6.

    What is the difference between if let and guard let?

  7. 7.

    What is type inference?

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