Informatica Data Analyst Interview Questions

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

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Explain Full Outer vs Left Join

Medium

Explain how FULL OUTER JOIN and LEFT JOIN differ when reconciling customer records across systems.

JoinsData WranglingCase When

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Top Customers by Last-Quarter Spend

Medium

Join customers and transactions, filter to the previous quarter, aggregate spend, and return the top three customers by total spend.

Date FunctionsJoinsAggregations

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Validate Unstructured to Relational

Medium

Tests ability to design validation for unstructured-to-structured data transformations.

Data Qualitydata integrationvalidation

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Back-Test Predictive Accuracy

Hard

Tests ability to evaluate model performance using rigorous back-testing methodology.

model validationTime Series

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Probability for Sequential Events

Hard

Tests probability reasoning for sequential dependent events.

Expected ValueConditional Probability

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Investigate User Engagement Decline

Medium

Investigate a 15% engagement decline by decomposing the metric, isolating root causes, and proposing actions.

RetentionDiagnosisEngagement Metrics

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