How Do You Capture Changes?

Concepts: paCdc

The CDC question gets harder when the source is not a database with a WAL. APIs, third-party SaaS platforms, file drops, and event streams all require different change-detection strategies. The interviewer wants to hear that your CDC toolkit extends beyond Debezium. CDC for Non-Database Sources A third-party API has no write-ahead log. You cannot attach Debezium to Salesforce. Instead, you poll the API's list endpoint with a modified_since parameter and diff the results against your last snapshot. This is timestamp CDC but with API-specific gotchas: rate limits, pagination cursors that expire, eventual consistency windows where a recently-modified record does not yet appear in query results. The interviewer is testing whether you have integrated with messy real-world APIs. The safety_margi