iOS Developer Interview Questions
In which situations do Swift functions not need a return keyword?
Suggested approach: There are three: when the function isn’t supposed to return a value, when it is supposed to return a value but you’ve used something like fatalError() to skip that requirement, and when it returns a value using a single expression. That second case is useful when you have placeholder functions you haven’t implemented yet, or have created an abstract class where child classes will override your erroring implementations.
Estimated difficulty: Easy
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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.
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