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iOS Developer Interview Questions

How much experience do you have using Core Data? Can you give examples?

Suggested approach: Core Data is a huge and complex topic, but you should at least have tried it once. You might find it useful to talk about how NSPersistentContainer made Core Data easier to use from iOS 10 onwards, or compare and contrast Core Data and CloudKit.

For a really great answer, talk about things that Core Data does well such as searching, sorting, and relationships, but also talk about places where Core Data struggles such as optionality and extensive stringly typed APIs.

  Estimated difficulty: Easy

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.

Related questions

See the full list of iOS interview questions

 
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