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iOS Developer Interview Questions

What steps do you take to identify and resolve battery life issues?

Suggested approach: This is something so many developers don’t ever think about, so use this as your chance to shine: talk about optimizing drawing, batching network requests, and minimizing work when the user isn’t interacting with the app.

Keep in mind that the battery settings app on iOS automatically shows which apps use the most battery life for a user, so having poor battery performance is very visible.

  Estimated difficulty: Intermediate

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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