iOS Developer Interview Questions
How would you explain closures to a new Swift developer?
Suggested approach: Closures are easy to begin with, but make sure you talk about capturing of values, capture lists (unowned vs weak), and why they are actually useful compared to other approaches. It’s possible your interviewer is looking for a broader discussion of functions as first-class types in Swift, so if they seem to be waiting for you to continue that might be a good angle to go down.
Estimated difficulty: Intermediate
See the full list of iOS interview questions
Important notes
- There are over 150 interview questions in the system. Once you've read the question and come up with a suitable answer, try reading my suggested approach and see if it helps you add more detail.
- These questions are not designed to be hard; a good interviewer is more interested in generating discussion that lets your ability and interests shine through.
- If you answer a question with "yes" or "no" you've missed the point – interviewers prefer you to provide reasoning, explanation, or detail, so try to elaborate with examples!
- If you're looking for detailed technical questions about the language, you should try my Swift tests instead – there are multiple challenges that will work your brain hard.
- For a whole series of coding challenges, I wrote the perfect book for you: Swift Coding Challenges.
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