iOS code review interview

In a code review round you are handed unfamiliar Swift and asked to assess it. It tests how you read code and how you communicate feedback.

What the round tests

You get a snippet or small project and walk the interviewer through what it does, what is wrong, and what you would change. They watch whether you orient quickly, prioritize real issues over style nits, and separate correctness bugs from design smells. Planted problems often include retain cycles, force unwraps, main-thread violations, races, and missing error handling.

How to review like a senior

Start with a fast orientation pass to understand intent before critiquing details, then lead with the highest-impact issues: correctness and safety first, then design, then style. Explain why an issue matters and what you would do instead. Frame feedback the way you would to a teammate, specific, kind, and actionable, since they are assessing you as a future reviewer.

Go deeper than a summary

Share Your Screen works topics like this through in full: 75 solved Swift problems with tests, 9 real case studies, and 7 annotated mock interviews, so you rehearse the live round instead of just reading about it.

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Frequently asked

What do you look for first in a code review interview?

Correctness and safety issues such as retain cycles, force unwraps, threading bugs, and missing error handling, before style.

Is tone assessed in a code review round?

Yes. Clear, kind, actionable feedback signals you would be an effective reviewer, which is part of what the round measures.