Top 50 schema design Interview Questions
The most frequently asked schema design questions across all roles and companies, ranked by real interview frequency. Updated daily.
Explain normalization, why it improves data integrity, and when denormalization is a practical performance tradeoff.
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National IndemnityExplain how to design scalable PostgreSQL data models using normalization, star schema trade-offs, indexing, and partitioning.
SalesforceExplain how to model time-series security telemetry with fact tables, partitioning, and indexes for scalable querying.
Palo Alto NetworksTests your database modeling skills for write-heavy workloads with strong consistency needs.
Press ganeyTests your ability to design data models that balance performance, maintainability, and clinical data needs.
Verana HealthCompute daily agent call KPIs and SLA using joins, aggregations, and window ranking in a contact center model.
ADPDesign two attendance tables and write simple PostgreSQL queries for employee presence, absences, and daily summaries.
Amazon Web ServicesDesign a schema and rank the top 10 customers by sales volume over the past month.
MicrosoftPlan execution for designing a compliant relationship schema linking doctors, trial sites, and sponsors in a life sciences platform.
Veeva SystemsDesign a governed warehouse schema that supports consistent metrics, historical analysis, and efficient cross-functional reporting.
WaymoTests ownership and stakeholder management when making ambiguous database design decisions for analytics use cases.
Chewy
Ancestry
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