Microsoft Azure Data Fundamentals DP-900 Practice Question

A document database stores data as self-describing JSON (or BSON) documents, allowing each record to have its own shape. Because the schema is flexible, new properties can be added without altering a central definition, and queries can directly target nested values inside each document. Column-family databases can add columns dynamically but organize data in rows and column families rather than self-contained JSON documents, so querying nested JSON structures is not native. Relational databases rely on a fixed table schema, and graph databases are optimized for relationship traversal rather than flexible JSON storage. Therefore, a document database best meets the requirements.