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Home/Questions/Cloud/Tools/Describe Amazon Athena and how it interacts with S3.

Describe Amazon Athena and how it interacts with S3.

Cloud/Toolsmedium0.5 min readPremium

Frequency

Low

Asked at 1 company

Category

179

questions in Cloud/Tools

Difficulty Split

104E|27M|48H

in this category

Total Bank

1,863

across 7 categories

Asked at these companies

Persistent Systems

Interview Pro Tip

Red Flag: Queries without partition predicates on large tables—cost explosion. Pro-Move: 'We partition by date and use Parquet; our 100TB table costs $50/query instead of $500—we enforce partition filters in IAM.'

Key Concepts Tested

Expert AnswerPremium

96 wordsInterview-ready

Architectural logic: Athena is serverless Presto/Trino—no cluster to manage; you pay per TB scanned. Why this model: Perfect for ad-hoc analytics on data lakes; decouples storage (S3) from compute. S3 interaction: Athena reads directly from S3; no ETL load step. Glue Catalog provides schema; queries scan only relevant partitions and columnar bytes. Scalability: Unlimited concurrency; each query spins up its own cluster....

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