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Citigroup Interview Questions

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

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1
SQL & Data ManipulationStart here. 5 questions · ~49 min
2
Coding5 questions · ~49 min
Reverse a Linked List in PythonEasy
Practice

Reverse a singly linked list in place using an iterative pointer update or recursion.

RecursionLinked ListspointersCitigroup
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3
Pipelines4 questions · ~39 min
Data Quality in ETL PipelinesEasy

Approach for maintaining data quality and integrity across ETL pipelines.

IdempotencyData ModelingQualityCitigroup
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4
Machine Learning4 questions · ~39 min
Supervised vs Unsupervised LearningEasy

Explain how supervised and unsupervised learning differ, and ground the distinction in a practical ML example.

Unsupervised LearningFeature EngineeringBias-Variance TradeoffCitigroup
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5
Execution5 questions · ~49 min
Recover a Slipping ProjectMedium

Explain how you would diagnose and recover a project that is falling behind schedule without losing stakeholder trust.

Success CriteriaRoadmappingRisk AssessmentCitigroup
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6
Metrics5 questions · ~49 min
Choose Product Success KPIsEasy

Define a practical KPI set for product success, balancing a north star metric with leading indicators.

North Star MetricKPIsLeading IndicatorsCitigroup
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7
More topics22 questions · ~215 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 MismatchCitigroup
Sizing an Untapped Product MarketHard

Framework for estimating TAM, adoption, and revenue for a new product launch in an untapped market.

revenue modelnew product launchMarket SizingCitigroup
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