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NPCI Interview Questions

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

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1
SQL & Data ManipulationStart here. 7 questions + 1 drill · ~72 min
2
Coding8 questions · ~71 min
Palindrome ProgramEasy
Practice

Determine whether text is a palindrome after ignoring case and non-alphanumeric characters using two pointers.

ProgrammingNPCI
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3
Execution7 questions · ~62 min
Plan a Phased Operations RolloutMedium

Plan a phased rollout for a new operational initiative with clear stages, success criteria, and risk controls.

Launch Planningphased rolloutsProject ManagementNPCI
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4
Metrics7 questions · ~62 min
Design an Operations KPI HierarchyMedium

Build a KPI hierarchy that links frontline operational signals to business outcomes and supports better decisions.

operational metricsperformance measurementkpi hierarchyNPCI
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5
A/B Testing & Experimentation3 questions · ~27 min
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 MismatchNPCI
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6
Machine Learning7 questions · ~62 min
Random Forest vs Gradient BoostingMedium

Compare Random Forest and Gradient Boosting, then choose the right ensemble for a supervised learning task.

Ensemble MethodsBias-Variance TradeoffSupervised LearningNPCI
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7
More topics11 questions · ~98 min
Handling Missing Data in PipelinesMedium

Approach for handling missing data in an ML data pipeline, including validation, imputation, and safe downstream consumption.

InfrastructureETLBatch ProcessingNPCI
Statistical Significance in Hypothesis TestingEasy

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

Hypothesis TestingData AnalysisStatistical SignificanceNPCI
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The finish line: interview-readyComplete all 50 questions plus 1 hands-on drill to finish this plan.