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Updated weekly · Last refresh Aug 30

Leidos Data Analyst Interview Questions

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

21questions
~3htotal time
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1
SQL & Data ManipulationStart here. 3 questions + 3 drills · ~54 min
Ensuring Data Accuracy and IntegrityMedium

Tests your data quality practices and integrity checks for large, varied datasets.

null handlingData Wranglingdata integrityLeidos
Investigating Report DiscrepanciesMedium

Tests your troubleshooting workflow and root-cause analysis for business-critical reporting.

ReconciliationDiagnosisdata integrityLeidos
Writing Complex SQL QueriesMedium

Tests your SQL depth, query design approach, and ability to support analysis at scale.

performancesql queriesdatabasesLeidos
Second Highest Without AggregatesHard
Practice
Recently asked
Practice drill

Find the second highest salary in each department without using aggregate functions.

SubqueriesRankingSelf-JoinsCredit GenieDevoteamCisco Restaurant + Bar
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
Impute Sparse Assessment ScoresHard
Practice
Practice drill

Use CTEs, joins, CASE, and null handling to clean sparse assessment scores and impute missing values per question.

null handlingData Wranglingdata integrityMercor
2
Behavioral & Leadership14 questions · ~112 min
Learning a New Tool FastEasy

Tests learning agility under delivery pressure, with emphasis on ownership, prioritization, and adapting quickly to unfamiliar technical work.

learning agilityinitiativeadaptabilityLeidos
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3
More topics4 questions · ~32 min
Data Cleaning in ETL PipelinesEasy

Approach for cleaning and preparing raw data inside an ETL pipeline.

Data WranglingETLQualityLeidos
Choosing the Right VisualizationMedium

Tests your judgment in communicating insights effectively through the right visualization choices.

MetricsCommunicationDiagnosisLeidos
Structuring Resource Allocation AnalysisMedium

Tests your analytical thinking and ability to translate operational questions into structured data analysis.

Metricsdata collectionUse CasesLeidos
Defining a ConfounderMedium

Evaluates your understanding of confounding in statistical analysis.

statisticsLeidos

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The finish line: interview-readyComplete all 21 questions plus 3 hands-on drills to finish this plan.