Which data-encoding format is most commonly used for the request and response bodies of modern REST APIs?
XML (eXtensible Markup Language)
YAML (YAML Ain't Markup Language)
CSV (Comma-Separated Values)
JSON (JavaScript Object Notation)
The vast majority of RESTful services exchange data in JavaScript Object Notation (JSON). JSON is lightweight, language-agnostic, easy to parse, and directly supported in JavaScript, making it ideal for web applications and network automation tasks. YAML is popular for configuration files, XML is still seen in some legacy or SOAP-style services, and CSV is unsuited for hierarchical data structures.
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