Relational databases commonly store data using key-value pairs.

• A. True
• B. Sometimes
• C. Not sure
• D. False

Answer: (D)

Relational databases organize data into tables with a fixed schema, where each row is a record and each column holds a specific attribute. Keys are used to enforce identity and relationships: a primary key uniquely identifies a row, and foreign keys link related rows across tables. This structure stores data as structured fields in a table, not as a flat map of key to value. While some systems offer ways to store JSON or other semi-structured data inside a column, that doesn’t make the overall storage a true key-value model. So, relational databases do not commonly store data using key-value pairs.