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Petco Interview Questions

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

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1
SQL & Data ManipulationStart here. 6 questions + 1 drill · ~67 min
2
Coding6 questions · ~57 min
First Non-Repeating CharacterEasy
Practice

Find the first non-repeating character in a string using frequency counting and a second pass in O(n) time.

Hash TablesStringsSearchingPetco
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3
Metrics6 questions · ~57 min
Measure Marketing Campaign SuccessEasy

Define campaign success using business KPIs, funnel conversion, acquisition cost, and leading indicators tied to outcomes.

Funnel AnalysisKPIsLeading IndicatorsPetco
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4
Execution6 questions · ~57 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 ManagementPetco
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5
A/B Testing & Experimentation3 questions · ~29 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 MismatchPetco
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6
Machine Learning6 questions · ~57 min
Debugging a Failing ML ModelMedium

Use a structured process to debug model performance issues across data, features, validation, and error patterns.

Feature EngineeringModel EvaluationSupervised LearningPetco
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7
More topics17 questions · ~162 min
Data Quality in ETL PipelinesEasy

Approach for maintaining data quality and integrity across ETL pipelines.

IdempotencyData ModelingQualityPetco
Prioritizing Operational Improvement BetsMedium

Framework for prioritizing operational improvements under tight resource constraints.

Strategic PlanningPrioritizationResource AllocationPetco
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The finish line: interview-readyComplete all 50 questions plus 1 hands-on drill to finish this plan.