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Compare CDC variants: log-based, query-based, and trigger-based. What are the failure modes of each?

Most candidates only know 'use Debezium.' The signal is comparing three CDC mechanisms by how they capture deletes, load the source, and handle ordering, plus the snapshot-to-stream stitching that trips up real deployments.

Updated Aug 2026 · Grounded in real Applied AI Engineer interview loops and written to a senior-engineer editorial bar.

Most candidates only know 'use Debezium.' The signal is comparing three CDC mechanisms by how they capture deletes, load the source, and handle ordering, plus the snapshot-to-stream stitching that trips up real deployments.

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