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Browse 3 real-world technical and behavioral interview questions about Event time. Review scenarios, edge cases, and architectural best practices.
Design a safely rerunnable data pipeline by making each output partition a deterministic result of its input partition, overwriting instead of appending, and writing into idempotent sinks that tolerate retries and late events.
Mediation normalises and deduplicates records against a persisted key window sized to the worst observed lateness, then rating prices each record by its event time against an effective-dated tariff version. Prepaid is not merely faster postpaid; it reserves quota against a live balance.
Decide it deliberately, because there is no correct default: you can hold the window open longer, accept the record and restate the figure, or drop it and report how much you dropped. What you must not do is let arrival order silently decide, which is what a pipeline keyed on ingestion time does.