For a web service that needs to ensure backward compatibility with older systems, which data format is more appropriate?

  • Avro
  • JSON
  • XML
  • YAML
XML is a suitable data format for ensuring backward compatibility with older systems. Its self-descriptive nature and schema support make it easier to maintain compatibility as systems evolve. XML allows for the inclusion of metadata and versioning information, providing a structured approach to handle changes in data structures over time.
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