Kafka - Schema Registry
Given a schema evolution where a new optional field is added, which compatibility rule will allow the new schema to be registered without errors?
Given a schema evolution where a new optional field is added, which compatibility rule will allow the new schema to be registered without errors?
medium📝 Predict Output Q4 of Q15
Step-by-Step Solution
Solution:
Step 1: Understand adding optional fields effect
Adding an optional field is backward compatible because old data can still be read by new schema.Step 2: Identify compatibility rule allowing this
BACKWARD compatibility allows new schema to read old data, so adding optional fields is allowed.Final Answer:
BACKWARD compatibility -> Option CQuick Check:
Adding optional field = BACKWARD compatible [OK]
Quick Trick: Adding optional fields is backward compatible [OK]
Common Mistakes:
MISTAKES- Confusing FORWARD with BACKWARD compatibility
- Thinking adding fields breaks compatibility
- Assuming FULL compatibility is always required
Master "Schema Registry" in Kafka
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