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change data capture

Applied AI interview questions tagged change data capture, across every topic.

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Concepts behind "change data capture"

The curriculum that explains the ideas these questions test.

Core
🗄️ Data & SQL EngineeringSign in
Change Data CaptureChange Data Capture (CDC) streams the inserts, updates, and deletes from a source database so downstream systems stay in sync without expensive full reloads. It powers incremental pipelines, real-time analytics, and keeping a search index or feature store fresh. The key concerns are handling updates and deletes (not just inserts), ordering, and idempotent application of the change stream. Applied-AI interviews probe it because keeping a RAG index, feature store, or warehouse current is a constant need, and full reloads do not scale.
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