iOS Developer Interview Questions
What does the @main attribute do?
Suggested approach: This attribute marks the point where your program starts to run. When using this attribute with one of your types need to implement a main() method to handle setting up your program, but if you’re using SwiftUI the App protocol provides that for you.
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 for job interviews, I wrote the perfect book for you: Swift Interview Challenges.
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finalkeyword do, and why would you want to use it? - What is the difference between an extension and a protocol extension?
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