FULL compatibility means backward and forward compatibility between which schemas?

FULL compatibility means backward and forward compatibility between which schemas?

• A. Backward only
• B. Forward only
• C. Backward and Forward Between X and X-1
• D. None

Answer: (C)

Full compatibility means the two most recent versions of a schema can interoperate in both directions. In practice, that means data produced with the newer schema can be read by systems using the older schema (backward compatibility), and data produced with the older schema can be read by systems using the newer schema (forward compatibility). This bilateral fit is what lets you evolve schemas without breaking either producers or consumers. So, full compatibility is about backward and forward compatibility between the current version and the previous version (X and X-1). The other options only cover one direction or none, which won’t preserve seamless evolution.

Full compatibility means the two most recent versions of a schema can interoperate in both directions. In practice, that means data produced with the newer schema can be read by systems using the older schema (backward compatibility), and data produced with the older schema can be read by systems using the newer schema (forward compatibility). This bilateral fit is what lets you evolve schemas without breaking either producers or consumers.

So, full compatibility is about backward and forward compatibility between the current version and the previous version (X and X-1). The other options only cover one direction or none, which won’t preserve seamless evolution.