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Kovai Interview Questions

The questions to prepare for Kovai interviews, across all roles. Questions from real interview reports rank first. Updated weekly.

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1
SQL & Data ManipulationStart here. 4 questions + 1 drill · ~50 min
2
Coding7 questions · ~69 min
Detect Cycle in Linked ListEasy
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Recently asked

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

Hash TablesLinked ListsTwo PointersKovai
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3
A/B Testing & Experimentation3 questions · ~30 min
Pitfalls in Streaming Experiment AnalysisHard

Identify major online experiment pitfalls and explain how they can bias results in a streaming product A/B test.

Network InterferenceNovelty EffectSample Ratio MismatchKovai
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4
System Design5 questions · ~49 min
Design a URL Shortening ServiceHard
Recently asked

Design a URL shortening service that routes, ranks, and monitors links at scale.

Feature StoreModel ServingKovai
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5
Execution7 questions · ~69 min
Integrate Automated Testing into CI/CDMedium

Explain how you integrated automated testing into a CI/CD pipeline while balancing coverage, speed, and release risk.

automated testingCI/CDpipeline integrationKovai
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6
Machine Learning6 questions · ~59 min
Handling Severe Class ImbalanceMedium

Explain how to train and evaluate a classifier when the positive class is rare and accuracy is misleading.

ExperimentationFeature EngineeringSupervised LearningKovai
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7
More topics18 questions · ~178 min
Diagnose KPI Drop After ReleaseMedium

Diagnose a post-release KPI drop by separating instrumentation issues from real behavior changes and tracing the problem through the metric hierarchy.

KPILeading IndicatorsDiagnosisKovai
Define Metrics for New FeaturesMedium

Define a success metric for a new feature that captures real user value, not just raw usage.

MetricsFeature Prioritizationuser valueKovai
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