Interview guides / ios
Number of Islands: iOS Interview Question
Number of Islands interview question with a clear example answer for iOS engineers. Practice with AceMobileInterview.
This is a common iOS interview topic: Number of Islands.
Below is a concise answer you can adapt in a real interview, then go deeper in the full AceMobileInterview track.
1.Count islands of 1s in a grid.
DFS/BFS flood fill or Union-Find. O(mn). Maps to flood-fill UI/region problems.
Keep going with AceMobileInterview
Reading helps. Timed practice locks it in. Jump into the interactive track for algorithms with LeetCode links, studio projects, debugging zips, and mobile system design.