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Yochana Data Analyst Interview Questions

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

27questions
~4htotal time
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1
PipelinesStart here. 7 questions · ~56 min
Data Warehousing in PipelinesEasy

Explain what a data warehouse is and why it matters in analytics pipelines.

InfrastructureETLData ModelingYochana
Data Integrity During System MigrationHard

Approach for preserving correctness during a pipeline migration, including validation, replay safety, and controlled cutover.

ETLIdempotencyQualityYochana
Describe a Complex Transformation PipelineMedium

Explain a complex ETL transformation you built, including the main challenges and how you handled them.

ETLData ModelingQualityYochana
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2
SQL & Data Manipulation8 questions + 3 drills · ~94 min
Customer Orders: LEFT vs INNER JOINEasy

Explain how INNER JOIN and LEFT JOIN differ, and when to use each for matched-only versus all-left-row analysis.

JoinsData WranglingGroup ByYochana
Handling Missing Data in SQLEasy

Explain how to identify, assess, and handle missing values in SQL using NULL checks, COALESCE, and validation logic.

Data WranglingCase WhenQualityYochana
Window Functions for TrendsMedium

Assesses your SQL window function knowledge for time-based analysis.

Window FunctionssqlYochana
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
Handle Missing Financial Input ValuesMedium
Practice
Practice drill

Use joins, CTEs, and CASE logic to flag and fill missing financial fields for Qlik planning records.

Data WranglingETLQualityQlik
Clean Event Statuses for AnalysisEasy
Practice
Practice drill

Clean raw status text with TRIM and LOWER, filter unusable rows, and count usable events by cleaned status.

Data WranglingETLQualityDatabricks
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3
Behavioral & Leadership10 questions · ~80 min
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4
More topics2 questions · ~16 min
Power BI vs Other ToolsMedium

Evaluates your tool selection judgment for stakeholder reporting needs.

data visualizationpower biYochana
Dashboard Performance Best PracticesMedium

Evaluates your ability to design analytics outputs that stay fast and usable.

best practicesdata visualizationdashboard designYochana
The finish line: interview-readyComplete all 27 questions plus 3 hands-on drills to finish this plan.