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SQL & Data Engineering / 13
hard★ EssentialDatabricksSnowflakePalantir

A customer's query on a 2-billion-row table takes 40 minutes. Walk me through your diagnosis.

The Databricks signature triage question. Strong candidates don't list optimizations, they run a diagnostic decision tree: plan first, then scan, shuffle, join strategy, files. Here's the tree.

Updated Sep 2026 · Grounded in real Forward Deployed Engineer interview loops and written to a senior-engineer editorial bar.

The Databricks signature triage question. Strong candidates don't list optimizations, they run a diagnostic decision tree: plan first, then scan, shuffle, join strategy, files. Here's the tree.

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