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iOS Developer Interview Questions

What is the difference between self and Self?

Suggested approach: Almost every Swift developer uses self regularly, but the question here requires to distinguish between that and the capitalized version. Start with self, which refers to the current object your code is running inside, then move on to Self, which refers to the current type your code is running inside. You can remember this by looking at the capital letter: we name our types using a capital first letter, so Self refers to a type.

  Estimated difficulty: Advanced

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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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