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Top 50 data auditing Interview Questions

The most frequently asked data auditing questions across all roles and companies, ranked by real interview frequency. Updated daily.

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SQL & Data ManipulationStart here. 32 questions · ~325 min

SQL Consecutive Anomalous DaysMedium

Practice

Identify multi-day streaks of anomalous email sending activity for a specific user using PostgreSQL window functions.

Window FunctionsDate FunctionssqlDDesjardins

Tessian

Handling 30% Missing Critical DataMedium

Practice

Audit critical-field completeness by application source and report missing-entry percentages.

missing valuesdata accuracyData Wrangling

American Credit Acceptance

Detect Duplicate Rows in SQLMedium

Practice

Identify every user row associated with an email address appearing more than once.

Group ByHavingdata anomaly

Expleo Group

SQL Duplicate Rows QueryMedium

Practice

Identify every row whose three-column combination occurs more than once, including the original row identifier.

sqldata anomalydatabase querying

Jefferies

DAX Functions UsedEasy

Practice

Identify DAX functions used across multiple projects and summarize their project coverage and latest usage.

daxanalytics toolsData Analysis

Adobe

SQL First Record from DuplicatesHard

Practice

Retain one record per duplicate business key using timestamp, sequence number, and a deterministic tie-breaker.

Window Functionsdeduplicationdata cleaning

Swiss Re

Window Functions for Data QualityMedium

Practice

Calculate chronological running transaction totals for each account while excluding non-posted transactions.

Window FunctionsData Manipulationsql

EPAM Systems

SQL Records Missing From TableEasy

Practice

Identify record IDs present in the source table but absent from the comparison table.

SubqueriesJoinsCTEs

Apex Systems

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Behavioral & Leadership6 questions · ~61 min

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Finance & Accounting6 questions · ~61 min

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Pipelines3 questions · ~30 min

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