In an Avro field definition, which element is required?

In an Avro field definition, which element is required?

• A. Name
• B. Doc
• C. Default
• D. Aliases

Answer: (A)

In an Avro field definition, the field’s name acts as the unique identifier for that position in every record. The name is essential because data producers and consumers refer to fields by this identifier when reading, writing, or transforming data. Without a name, a field cannot be mapped to a value in the actual records, making the schema unusable for that field. The other properties—documentation, a default value, and aliases—are optional metadata that describe the field, provide a fallback value, or offer alternate names, but they are not required to identify the field itself. (Note that the field’s type is also required to define what kind of data is stored, but among the options, the name is the fundamental element needed to reference the field in the schema.)

In an Avro field definition, the field’s name acts as the unique identifier for that position in every record. The name is essential because data producers and consumers refer to fields by this identifier when reading, writing, or transforming data. Without a name, a field cannot be mapped to a value in the actual records, making the schema unusable for that field. The other properties—documentation, a default value, and aliases—are optional metadata that describe the field, provide a fallback value, or offer alternate names, but they are not required to identify the field itself. (Note that the field’s type is also required to define what kind of data is stored, but among the options, the name is the fundamental element needed to reference the field in the schema.)