Practice English vocabulary for evolving event schemas: versioning, backward compatibility, breaking changes, schema registries, and consumer handling.
0 / 5 completed
1 / 5
What does 'the event schema is versioned' mean?
Schema versioning allows producers and consumers to evolve independently. An event might include a 'schemaVersion' field or be published to a versioned topic, so consumers know how to interpret the payload.
2 / 5
What are 'backward-compatible changes' in event schema evolution?
Backward-compatible changes (like adding optional fields) allow existing consumers to continue processing events without modification. Old consumers simply ignore new fields they don't know about.
3 / 5
Why does 'a breaking change require a new event type'?
Creating a new event type (version) for breaking changes allows producers to publish both old and new versions simultaneously, giving consumers time to migrate. This avoids forced simultaneous upgrades.
4 / 5
What does 'schema registry enforces compatibility' mean?
Schema registries centrally manage event schemas and enforce compatibility rules (BACKWARD, FORWARD, FULL). Producers must register their schema before publishing, and the registry rejects incompatible changes.
5 / 5
What does 'the consumer can handle both v1 and v2 events' mean?
During migration, a consumer may receive both old (v1) and new (v2) events. It inspects the version field and applies the appropriate deserialization and processing logic for each, ensuring no events are lost during the transition.