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PA Consulting Interview Questions

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

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1
CodingStart here. 4 questions · ~38 min
Design an LRU CacheEasy
Practice
Recently asked

Implement an LRU cache in O(1) average time using a hash table and doubly linked list.

Hash TablesQueueLinked ListsPA Consulting
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2
SQL & Data Manipulation4 questions + 2 drills · ~58 min
SQL Top 3 Customers Per MonthMedium
Practice
Recently asked

Use monthly aggregation and ROW_NUMBER to identify PA Consulting's top three revenue-generating clients each month.

Window FunctionsRankingAggregationsPA Consulting
Monthly Sales Trends by CategoryMedium
Practice
Practice drill

Aggregate monthly sales by product category and use LAG to calculate month-over-month changes.

InfrastructureToolsData WranglingTotal Wine & MoreInc.Benjamin Moore
Rank Top Clients by Product RevenueEasy
Practice
Practice drill

Use a CTE, joins, and RANK() to find the top 2 clients by revenue for each product from completed 2024 orders.

Window FunctionsRankingAggregationsGooglePublicis GroupeRTX
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3
Metrics4 questions · ~38 min
Diagnose a Metric Drop After LaunchMedium

Investigate why a key KPI moved the wrong way after a product change and separate signal from noise.

Lagging IndicatorsLeading IndicatorsDiagnosisPA Consulting
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4
A/B Testing & Experimentation4 questions · ~38 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 MismatchPA Consulting
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5
Machine Learning4 questions · ~38 min
Prevent Overfitting in ML ModelsEasy

Explain how to reduce overfitting using regularization, validation, and model selection.

Cross-ValidationBias-Variance TradeoffRegularizationPA Consulting
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6
Pipelines5 questions · ~47 min
Design an End-to-End Data PipelineMedium
Recently asked

Approach for designing an end-to-end data pipeline from ingestion through transformation, storage, and downstream consumption.

data pipelinedesigningestionPA Consulting
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7
More topics25 questions · ~237 min
Proactive Risk Management ProcessMedium

Explain how you identify, assess, and mitigate delivery risks early enough to protect the critical path.

risk analysiscritical pathRisk AssessmentPA Consulting
Explaining Confidence IntervalsEasy

Explain what a confidence interval means and how to communicate it to a non-technical stakeholder.

Confidence IntervalsHypothesis TestingCommunicationPA Consulting
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The finish line: interview-readyComplete all 50 questions plus 2 hands-on drills to finish this plan.