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Top 50 distributed databases Interview Questions

The most frequently asked distributed databases questions across all roles and companies, ranked by real interview frequency. Updated daily.

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62companies covered
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1
SQL & Data ManipulationStart here. 33 questions · ~399 min
Database ShardingMedium
Practice
Recently asked

Explain sharding by reporting workspace counts and storage utilization for each active shard.

distributed databasesshardingAggregationsAsana
Optimize Slow Analytical SQLHard
Practice
Recently asked

Optimize a multi-table PostgreSQL query that ranks eligible Apple device models by active customers and net revenue.

Performance Tuningdatabase optimizationquery optimizationApple
Database Trade-Offs for DetectionHard
Practice
Recently asked

Compare financial crime detection architectures using joined run metrics, aggregates, NULL handling, and ordered performance results.

fraud detectionTrade-offsdistributed databasesDeloitte
Cloud SQL, Spanner, and BigtableMedium
Practice

Return the latest health metrics for active Cloud SQL, Cloud Spanner, and Cloud Bigtable services.

SubqueriesJoinsData WranglingHCLTech
Spark Query Optimization InternalsHard
Practice

Explain Spark query optimization techniques and demonstrate an optimized analytical query over job and stage metrics.

database optimizationlarge datasetsquery optimizationNVIDIA
Clean Missing and Corrupted DataHard
Practice
Recently asked

Identify missing and corrupted measurement records across distributed sources using PostgreSQL joins and conditional validation.

missing valuesdatabase managementdata handlingAccenture
Partitioning and Sharding at ScaleHard
Practice
Recently asked

Measure event balance across database shards and identify overloaded or underutilized shards.

distributed databasesdatabase designshardingPinterest
Choose Join Strategies in Distributed SQLHard
Practice
Recently asked

Compare hash, merge, and broadcast join strategies, including PostgreSQL-compatible ways to inspect and influence execution plans.

database optimizationJoinsdistributed databasesLyft
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2
System Design10 questions · ~121 min
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3
Pipelines4 questions · ~48 min
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4
More topics3 questions · ~36 min
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