[Solved] Given the following schemas, which is the most restrictive compatibility rule that will allow the new schema to be registered without error?Old schema: {"type": "record", "name": "User", "fields":... | Kafka

Kafka - Schema Registry

Given the following schemas, which is the most restrictive compatibility rule that will allow the new schema to be registered without error?

Old schema: {"type": "record", "name": "User", "fields": [{"name": "name", "type": "string"}]}
New schema:

{"type": "record", "name": "User", "fields": [{"name": "name", "type": "string"}, {"name": "age", "type": ["null", "int"], "default": null}]}

AFULL

BFORWARD

CNONE

DBACKWARD

Step-by-Step Solution

Solution:

Step 1: Analyze schema change
The new schema adds a field with a default value, which is backward and forward compatible.
Step 2: Determine compatibility rules allowing this
FULL compatibility requires both backward and forward compatibility, which this change satisfies.
Final Answer:
FULL -> Option A
Quick Check:
Adding default field = FULL compatible [OK]

Quick Trick: Adding default fields supports full compatibility [OK]

Common Mistakes:

MISTAKES

Thinking adding fields breaks backward compatibility
Confusing NONE with allowing all changes
Ignoring default values in new fields

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Given the following schemas, which is the most restrictive compatibility rule that will allow the new schema to be registered without error?

Step 1: Analyze schema change

Step 2: Determine compatibility rules allowing this

Final Answer:

Quick Check:

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