Top 50 indexes Interview Questions
The most frequently asked indexes questions across all roles and companies, ranked by real interview frequency. Updated daily.
Optimize a slow PostgreSQL query that aggregates completed transactions while preserving customers with no matching activity.
Capgemini
NomuraWrite a selective PostgreSQL ticket query and explain how indexing can improve its filtering and sorting performance.
Zendesk
FactoredOptimize a large Apple analytics query using partition pruning, selective indexes, joins, aggregation, and window calculations.
AppleOptimize PostgreSQL joins and pre-aggregation to report enterprise customer revenue and support activity at scale.
AccentureOptimize a PostgreSQL aggregation query over large order data using selective filtering, indexes, and execution-plan analysis.
ToyotaOptimize a PostgreSQL aggregation over large sales tables by filtering early, reducing rows, and ranking top models by region.
ToyotaExplain how to optimize a PostgreSQL join and aggregation query while preserving correct filtering and results.
RipplingExplain how to diagnose slow PostgreSQL queries in production and choose effective indexing strategies.
Honor
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