JSON documents from a web API — flexible schema, nested fields, some fields missing across records. Which data classification?
A.Structured data
Structured implies a rigid schema like SQL tables.
B.Semi-structured data
JSON = semi-structured. Correct.
C.Unstructured data
Unstructured has no organizational markers at all.
D.Relational data
Relational is a structured-data model — JSON isn't relational.
Why this answer
Semi-structured data has organizational markers (tags, keys, nesting) but no fixed schema — JSON/XML are the canonical examples. Structured = fixed-schema tables; unstructured = video/images/free text.
Correct answer: B · Last reviewed 2026-11-05
Official AWS references
Practice this interactively
Answer without seeing the solution first in the Core Data Concepts practice session.
Practice Core Data Concepts