Top 17
Prep plan
Updated weekly · Last refresh Nov 6

KAYAK Mobile Engineer Interview Questions

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

17questions
~3htotal time
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1
CodingStart here. 9 questions · ~81 min
Longest Unique Substring in EnoMedium
Practice

Use a sliding window and hash map to find the longest substring without repeated characters in a string.

Hash TablesStringsTwo PointersKAYAK
iOS Coding ExerciseMedium

Evaluates practical iOS engineering skills, problem-solving, and validation through testing.

KAYAK
REST vs GraphQL Trade-offsMedium

Tests API design judgment and ability to weigh performance, flexibility, and complexity.

Hash TablesArraysStringsKAYAK
Swift CRUD ImplementationMedium

Tests practical Swift skills and ability to build basic data flows end to end.

Hash TablesArraysStringsKAYAK
iOS Memory ManagementMedium

Tests understanding of iOS memory management and how to prevent leaks and performance issues.

StackLinked ListsArraysKAYAK
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2
Behavioral & Leadership6 questions · ~54 min
Optimizing a Production Mobile BottleneckEasy

Tests ownership and prioritization in fixing a real mobile production performance issue, with emphasis on diagnosis, trade-offs, and measurable user impact.

CommunicationOwnershipPrioritizationKAYAK
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3
More topics2 questions · ~18 min
Build an Engagement FeatureMedium

Approach for identifying, prioritizing, and launching a new feature that increases user engagement.

Feature PrioritizationUser NeedsUse CasesKAYAK
Using Metrics to ImproveMedium

Tests data-driven debugging and prioritization using app performance metrics.

KPIsLeading IndicatorsDiagnosisKAYAK

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