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Senior Ios Engineer Interview Questions
2,074 senior ios engineer interview questions shared by candidates
What have you been working on lately?
Verbatim from the non-English engineer: "OS reads 4KB of data, the file can be 1KB but OS stores in 4K. It has this function: int read4K(buffer). Can you write function int read(buffer, int) that uses read4K(buffer) so apps can call it?"
- dependency inversion - SRP - SOLID principles and general architecture of iOS - Multithreading (Largely old out of date stuff that is irrelavent so be careful here when studying) - type erasure - reference counting (swift has automatic but they wont accept it as an answer) - reactive frameworks and conceptions - oop vs functional - associated types and Generic - swift and objectvie c based questions
How do you approach unit testing private methods in a codebase?
Add a feature from a provided Figma design, into a project on GitHub.
given an N-ary tree, print the boundary nodes in anti-clockwise order. • In a Binary Search Tree, find the value closest to a given double (recursively). • Implement a rate limiting API algorithm; extend the discussion into iOS-related implementation details. • System design: build a dating app like Tinder, focusing on scalability, user matching, and real-time performance.
Interview mainly wanted to do a test project of a modified Fibonacci sequence algorithm.
Given a skeleton project, how would you implement a grid view with X behavior?
Mutations and how it work with struct and class
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