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Updated weekly · Last refresh Aug 30

Nykaa Data Scientist Interview Questions

The questions to prepare for a Nykaa Data Scientist interview. Questions from real interview reports rank first. Updated weekly.

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1
Machine LearningStart here. 5 questions · ~41 min
Cold-Start in RecommendationsMedium

Tests strategies for recommendations when user or item history is missing.

user engagementRecommendation SystemsNykaa
Class Imbalance for ChurnMedium

Tests knowledge of imbalance handling and evaluation considerations for churn.

data preprocessingClass ImbalanceNykaa
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2
System Design5 questions · ~41 min
Scalable Recommendation SystemHard

Tests end-to-end system design for recommendations at consumer scale.

system designRecommendation SystemsNykaa
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3
Behavioral & Leadership5 questions · ~41 min
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4
More topics6 questions · ~49 min
First Checks for Metric DropsEasy

Outline the first checks to diagnose a sudden drop in a core product metric, starting with data quality, scope, and decomposition.

Lagging IndicatorsLeading IndicatorsDiagnosisNykaa
Common Pitfalls in Experiment ResultsHard

Identify the main pitfalls that can distort A/B test interpretation and explain how to guard against them.

PeekingNovelty EffectSample Ratio MismatchNykaa
Statistical Significance in Hypothesis TestingEasy

Explain what statistical significance means and why it matters when interpreting experimental or analytical results.

Hypothesis TestingData AnalysisStatistical SignificanceNykaa
SQL Join Query OptimizationHard

Tests query optimization skills for performance and correctness at scale.

Performance TuningJoinsNykaa
Define Success Metrics for FeaturesMedium

Set a clear north star, supporting KPIs, leading indicators, and guardrails for a new product feature.

North Star MetricLagging IndicatorsKPIsNykaa
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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
Second Highest Without AggregatesHard
Practice
Practice drill

Find the second highest salary in each department without using aggregate functions.

SubqueriesRankingSelf-JoinsCredit GenieDevoteamCisco Restaurant + Bar
Six-Month User Retention CohortsHard
Practice
Practice drill

Calculate six-month retention by signup cohort using CTEs, joins, aggregations, and month-based date logic.

Window FunctionsRetentionCohort AnalysisNykaa
Second Attempt Score Per UserEasy
Practice
Practice drill

Use ROW_NUMBER to return each student's second score on a specified Khan Academy exercise.

Data Analysissqluser engagementKhan Academy
The finish line: interview-readyComplete all 21 questions plus 3 hands-on drills to finish this plan.