Top 38
Prep plan
Updated weekly · Last refresh Oct 17

GEN Mobile Engineer Interview Questions

The questions to prepare for a GEN Mobile Engineer interview. Questions from real interview reports rank first. Updated daily.

38questions
~6htotal time
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1
CodingStart here. 9 questions · ~81 min
Maximum Subarray SumEasy
Practice

Compute the largest sum of any contiguous subarray using Kadane's algorithm in O(n) time.

Dynamic ProgrammingArraysGreedyGEN
Detect Cycle in Linked ListEasy
Practice

Use Floyd’s two-pointer algorithm to determine whether a singly linked list contains a cycle.

Hash TablesLinked ListsTwo PointersGEN
Unit Testing Async CodeMedium

Assesses your approach to testing async behavior reliably and deterministically.

GEN
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2
System Design12 questions · ~109 min
MVVM vs VIPER vs MVC Trade-offsMedium

Tests architectural reasoning and ability to choose patterns appropriately for maintainability and scaling.

mvvmGEN
Performance Engineering With SecurityHard

Tests ability to meet security constraints without degrading performance in mobile apps like GEN’s.

performance optimizationmobile architectureSecurityGEN
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3
Security & Infrastructure10 questions · ~91 min
Swift Memory Management and PitfallsMedium

Tests Swift memory management fundamentals and ability to prevent retain cycles in iOS apps.

memory managementretain cycleswiftGEN
Networking, Parsing, CachingMedium

Tests ability to design efficient networking flows, parsing, and caching strategies in mobile apps.

data parsingNetworkingcachingGEN
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4
Behavioral & Leadership6 questions · ~54 min
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5
More topics1 question · ~9 min
iOS Fundamentals for Mobile FeaturesEasy

Tests iOS core knowledge and practical fundamentals for building mobile features.

mobile developmenttechnical depthGEN
The finish line: interview-readyComplete all 38 questions to finish this plan.