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Updated weekly · Last refresh Oct 17

Barclays Data Analyst Interview Questions

The questions to prepare for a Barclays Data Analyst interview. Questions from real interview reports rank first. Updated daily.

50questions
~7htotal time
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1
Statistics & ProbabilityStart here. 25 questions · ~220 min
Conditional Probability in Fraud ScreeningEasy

Explain conditional probability and show how to compute the probability of one event given that another event occurred.

VarianceExpected ValueConditional ProbabilityBarclays
Variance in Risk AnalysisEasy

Explain variance as a measure of dispersion and why higher variance signals greater uncertainty in risk analysis.

CorrelationVarianceExpected ValueBarclays
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2
Pipelines8 questions · ~70 min
Batch vs Streaming Data ProcessingEasy
Recently asked

Compare batch and streaming data processing, including when each fits best in a pipeline.

Stream ProcessingETLBatch ProcessingBarclays
Backfilling Missing Pipeline DataMedium
Recently asked

Approach for safely backfilling missing data while preserving correctness, idempotency, and data quality.

ETLQualityBarclays
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3
SQL & Data Manipulation7 questions + 1 drill · ~72 min
Dealing with Unstructured DataMedium
Practice

Extract, standardize, validate, and filter inconsistent transaction payloads using PostgreSQL JSON and string handling.

data cleaningnull handlingData WranglingBarclays
Complex Joins for Time SeriesMedium
Practice

Join account balances to time-valid benchmark rates while retaining prior balance context.

Lag/LeadDate FunctionsJoinsBarclays
Handling Missing DataMedium
Practice
Recently asked
Practice drill

Standardize missing observation fields with fallback values, missingness flags, and ordered output.

Window Functionsmissing valuesdata cleaningEversource EnergyCincinnati Children's HospitalAdtalem Global Education
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4
Behavioral & Leadership8 questions · ~70 min
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5
More topics2 questions · ~18 min
ETF vs Mutual FundsEasy

Assesses your understanding of common investment products relevant to Barclays clients.

financial productsmarket understandingBarclays
ETF Primary vs Secondary MarketEasy

Evaluates your product knowledge of how ETFs trade and where liquidity is formed.

market understandingBarclays
The finish line: interview-readyComplete all 50 questions plus 1 hands-on drill to finish this plan.