A developer stores sensor readings as JSON files in Azure Blob Storage. Each file contains key-value pairs, but no fixed table schema is enforced. How should this data be classified for reporting purposes?
Structured data
Semi-structured data
Unstructured data
Binary large objects (BLOBs)
JSON documents contain tags or keys that describe each value, so the data carries some self-describing structure. However, the layout is not bound to rigid rows and columns like a relational table. Because it has an irregular but identifiable structure, JSON is considered semi-structured data. Structured data would exist in a predefined tabular schema, while unstructured data such as free-form text or images lacks recognizable fields. The term "binary large objects (BLOBs)" refers to a storage format rather than a data structure classification.
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