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iOS Engineer Interview Questions
Practice 9403 coding, system design and machine learning questions from 546 companies, sorted by role, topic and interview round. Every question has step-by-step hints, a code runner that supports 8 languages and an AI mentor; members also get the full solution walkthrough.
- 9403
- Questions
- 546
- Companies
- 11
- Topics
- 8
- Languages
Showing 1–3 of 3 results
- NextdoorEasyiOS EngineerFlatten Nested Comments
This problem tests your ability to traverse a nested tree structure (comments) and flatten it into a linear representation while respecting hierarchical depth levels.
Coding & AlgorithmsTechnical ScreenTreesRecursionData Structures - OpenAIMediumiOS EngineerImplement A Mobile Chat Interface In An Existing Codebase
Tests your ability to design and implement a streaming chat interface state manager in an existing mobile codebase, focusing on async token streaming, state modeling, cancellation, and error handling.
Software Engineering FundamentalsTechnical ScreeniOSSwiftConcurrency - WhoopHardiOS EngineerDesign a BLE Command Handler
This question evaluates a candidate's understanding of BLE communication, concurrency control, command queuing and sequencing, timeout and failure policies, lifecycle and cancellation handling, and testability for production-grade mobile applications.
System DesignTechnical Screen
Nextdoor
OpenAI